ID:905203
 
(See the best response by Nadrew.)
This might better server as a bug report, but this might only be happening for me. Currently the BYOND "Delete cahce" button wont work. It says it does, but doesnt. I had to uninstall BYOND and manually delete it resulting in a 220+ Minute deletion of the cache. Appearntly this button has been broken for some time when i thought it was working fine.

Has anyone else had problems with this?
Best response
Seems to be working fine for me, make sure your cache folder isn't read-only or something similar.

It may simply be because your cache had grown so large the built-in method couldn't handle it.
Turns out the problem was it was Read-Only. But i only have that option and the "hidden" option.

I also measured the BYOND cache file size bfore deleting it(Thats still deleting now). It was over 1.5 GBs of cache files.