Poltava Hi!
Re-download and re-install. 
Sillius_Sodus has reported a similar problem, in this same forum section, but after downloading once again the aircraft from M4T and re-installing them, the problem disappeared...Strange thing! is it related to the problems with medafire some users have reported?
20% crashes means generally that the game looks for java files and doesn't find them. Some users have reported that with DBW1.7 you may need to name the Bomb packs folders Arms_Spain and Arms_France instead of _Arms_Spain and _Arms_France. This may be related.
Will redownload, and reinstall, and check the re-name thingie. (And, yes, I have had problems with Mediafire.) Hopefully it will be fixed soon! Thanks!
UPDATE 1: No neither thing did work

This must surely be one of the strangest things I've seen lately in this game. It is quite unstable now, all related to movement of the joystick. Even when I fly the Bf109E I touch the joystick and - BANG.
I will go back and disable aircraft after aircraft, in reverse. See if that will help - because earlier this week it all worked fine, and the Fury flew like a Fury...
UPDATE 2: Took out the Grumman Delfin, and now everything seems to be back to normal!

Strange. Could be a corrupted download. Will later try and reinstall it.
UPDATE 3: Installed the Gamma, that ugly duckling. BANG! Problem is back... Curioser and curioser said Alice.
UPDATE 4: Took out the Gamma, and everything is fine again! Maybe it's just me being greedy, wanting to have all those beautiful aircraft of DreamK's. I will stay away from these latest ones, at least for a while, so I can go on with my Madrid campaign.
UPDATE 5: Installed the Potez, and everything worked without a snag. No signs of the problems experienced with the Gamma and the Delfin.