Hi Candy 
Ive read the whole thread and I understand your frustration and confusion.
But lets look at the whole thing from a different perspective.
I think this is something you already have an answer for, since you said it yourself that
If every single audio would be causing you the same issue, then we would suggest different things (like more likely you are overusing them or that your aura and energy systems need to grow and strengthen) but this is not the cause, since only one audio has the opposite effect on you, and further more you said it several times, everybody or lots of people comment that it works perfectly, so its not the audio, its not the technique used to create the field or the concept of Morphic fields.
We dont need to get too technical or analyze in detail the way morphic fields made by Captain work (specially because we are not the creator himself, so what we understand comes from what each one of us have experienced during certain periods of time, or comparing the process with other practices) , specially since you have used others, you more or less can pick up, pint point, understand how they actually work based on how they have felt in the process of healing or changing anything in you (all the other audios that have worked for you) but just for your mind’s tranquility, and in very simple words, the fields are energy, transmitted to us through the vibration of sounds, like the sounds sinply is the carrier of the fields energy, we “absorbed, embraced, suck” or it is “infused” in whatever you wanna call it, either through or by our Aura or our different energy systems like chakras, dantians, meridians etc or subconscious mind. Depending the type of audio or other tools.
We are exposed to that mechanism ALL the time in our daily life, the difference here is that the exposure to these fields brings healing and transformation to us.
Having said these things i think we can agree that:
Morphic fields work in our physical, emotional and mental benefit. (So long your energy systems are not weak or depleted)
You have successfully used several other audios made by the same creator… Captain.
This particular audio you mentioned has lots of great reviews on YouTube and here in the forum.
Theres nothing weird about morphic fields or this audio.
Everybody that has commented before Me and myself i believe or at least its my perception, reached the same conclusion: The issue is within your lungs or other aspects in your body etc
And thats why people kept suggesting you other fields or different approaches. But yeah, it happens, this and that field is great and fast for so and so people, some others havent seen results as fast, some fields are strong for some people, and very easy to manage for others.
Why the difference?
Because every person has a different body, even if the anatomy looks the same, there are endless elements in the body, environment and life of each individual that requires different ways to work on. And thats why we see several different audios and tools for what seems targetting the same. We get the opportunity to try them until we find the perfect one for us to use alone or along others and create perfect alchemy, synergy, harmony etc
Now, lets see about this particular body and case: yours.
First of all, tho, i agree that aging plays a part, honestly, middle 50’s is not that old to be having these issues. Theres gotta be more to it, specially when you mentioned that you dont suffer of any condition or have a history of related problems. But you also say:
ALLERGIES
Sometimes, unfortunately for a lot of people, lung problems start showing after years of being exposed to triggers that you didnt even realize at the time or remember. Asbestos, Chemicals, Metals, Cats, etc.
And they find themselves not understanding why since they never smoked or had asthma growing up etc.
Those triggers can be silent for years.
I dont think its just aging.
The audio again, is not the problem, but because its strong, its showing you or revealing an underlying problem you didnt know you had, its weak not just for aging, aging alone would never cause the reactions that you mentioned by listening to an audio that is made to help the target and that lots of people have agreed it helps.
So if you dont remember having been exposed to what i mentioned above (oh second hand smokers get it worse than the actual smokers, so think of that too)
Then it might be something congenital you dont know about, or the size of the lungs is not within normal range. Whether smaller or bigger it would cause the same issues.
You could be having these unknown conditions:
Mentioning it in conventional words for easier understanding.
Yes, Pleura could be inflammed, but more than that if there is liquid between the layers, the audio helping the lungs to expand their capacity could create pressure outwards, therefore can cause pain and the feeling of the lungs being inflated.
Ill give you a simple example,
Have you ever got a finger infected because you hurt the skin when cutting the nail, and the finger got swelling? The swelling is literally liquid or pus between the skin and the tissue and nail. Remember how it feels? Tight, burning, about to explode, skin stretches?
If there is liquid in the passages or between the pleura and the lung or chest, expanding the capacity of the lungs would feel like stretching the skin of the finger.
So yeah you might try using that audio suggested up there for a few days. Minimum 5. And see how it feels.
If you feel better then keep using it for longer. 1 month, 2 months. THEN use this one again just maybe once a day for like 3 days and see how you feel.
What im trying to get at here is that you can try other audios before, to see if there was an underlying problem that needed to be solved before so the lungs could sustain the strong energy of the lungs field.
If nothing changes.
Then second option is
The auto immune system field.
there are a few conditions that directly affect the lungs, might just be showing up now.
You can combine that with DNA repair. (Read the descriptions in both and follow instructions correctly)
If the triggers i mentioned earlier resonate to you or had you remembering you being exposed in the past, then not only the lungs tissues might be affected but also the bronchioles might be blocked, or the Cilia having inherited disfunction or by exposure to other stuff not just smoking which you dont but other things maybe.
There are damages in the lungs that cant be reversed by normal treatments.
But you can use the Plasma Light Beach one as suggested above, same just that one alone increasing the time of listening little by little, if you have Blue Print of Life you can play them together and that can definitely help you resverse damages etc.
I also suggest the the lung antioxidant one for a few days, and someone mentioned the super lung trainer, in case the muscles around the lungs need or could use improvement and then that helps the breathing too.
The 5 elements balance on Dream Seeds feels very gentle yet it is super good to balance everything in the body.
And last because 
you never know… lung or breathing problems are also associated with anxiety, sandness, depression, insomnia, loneliness among other similar things.
But if you feel that nothing i said sounds like it, Doctor didnt mention a specific problem, you think is just age, and that its definitely the audio, then dont use it any more.
And definitely just get either BoL or
Elemental Alchemical Ability: New Release
Or both.
And just work with those for a good while.
Of course up to you. 