If you have been following the thread "Bug which increases FPS" you already know this, but me and a few users were trying to fix the game framerate, and we did! So here it is! The FPS fix on everything. There are many versions of this fix, but the most stable ones are these:
Try all of them to see which is more stable in your PC. 1.4 usually fixes the crashes. If you still have crashes in 1.4, it doesn't depend on me anymore. It depends on your PC and specs.
KNOWN CRASHES (These happen after a certain period of time playing):
Character selection screen on Free Battle.
Hashirama vs Madara Part 1.
Hashirama vs Madara Part 2.
After 10 minutes of playing any mode.
Some Ultimate Jutsus
Taka Flies [Finishing Orochimaru with UJ]
If it crashes for you after the latest fix:
Try putting it on "High" from the task manager (Not realtime).
If you use Google Chrome, close it ASAP because it consumes your RAM like a monster.
Close any kind of program that eats RAM.
The game is kinda heavy for some reason, so the more resources you have to make it run well, less frequent crashes will be.