Accidentally associated Adobe AIR file with Acrobat, now an otherwise easily fixed problem has been causing me far too much anger.

Question

I accidentally associated an Adobe AIR file to open Adobe Acrobat in it's stead, now an otherwise easily fixed problem has been causing me far too much anger.
Basically I downloaded an .air file after recently reformatting my computer, and I tried to open it with Acrobat. Now, since there is no actual application and or shortcut created by AIR I can't just tell the file to use that. I've found that I'm not alone in this issue, have tried a few things I've read on both this forum and others, and have come to no resolution as of yet. This file isn't anything of any great significance, but it bugs me so much that at this point I just want to know how to fix this and win this little battle.
Thanks in advance to anyone willing to help.

Answer 1

Thank JJMack - that has helped me get closer to the problem.
I opened the resource monitor and you can see a screenshot of what is going on when I try to save a simple, 9 Kb graphic. (I'm saving an RGB JPG, not a PNG or animated GIF file. Doing anything complex / memory intensive than saving or simple edits in PS is almost impossible.)
As you can see from the screencap below, when I save (it doesn't make a difference if it is save vs. save to web or a network or local drive) Photoshop becomes unresponsive. (From past experiences, if I try to switch to a non-Adobe program it will also freeze and sometimes crash.) When PS becomes unresponsive, the NT Kernel & System immediately goes to the top of the list and uses 200+ threads.
From there Photoshop will typically be frozen for about a minute, then will recover and take another minute or two to finish the save. At that point PS is okay, but the rest of the computer is still frozen with CPU oscillating up to almost 100%.
As soon as the NT Kernel & System settles down, everything is back to normal again (as long as I haven't used other programs, which in one case required a hard reboot.)
It is pretty clear the problem is rooted in Adobe / Window 7 as I only have this problem with Adobe programs. (Illustrator isn't as bad, but I've had problems with it as well.)
The question is: How do I fix this, as it is killing my ability to work?
Thanks! Julie