Try not to install anything custom made unless you know for a fact that it's compatible with the newer version.
Have you tried restarting your router, logging into another computer / different browser perhaps?
After re-downloading the game, have you tried downloading the game using another method? Ran the game as an administrator? ( might be some missing / bad files ).
Sorry if these come off as confusing, just throwing ideas out there.
Since files are going missing maybe your anti-virus is removing them. Try disabling it and playing the game after you do a fresh install.
I'll try that, I do have a quite annoying anti-virus program... ;)
Try not to install anything custom made unless you know for a fact that it's compatible with the newer version.
Have you tried restarting your router, logging into another computer / different browser perhaps?
After re-downloading the game, have you tried downloading the game using another method? Ran the game as an administrator? ( might be some missing / bad files ).
Sorry if these come off as confusing, just throwing ideas out there.
As I've stated, it has worked for quite a while after that first reinstall.. but now it's starting to crash again. As M'Lass stated, it may have been my anti-virus.
I have restarted my router, but I do not think that a different browser would do anything.