I wonder if you could make the switch in the game and it would keep the setting. Or maybe find the developer option and set it to true.

Try launching the character, type "/setpref developer true", type "/setpref usePNGcache true", exit, clear the cache again, relaunch. Hope that works. There have been a lot of changes to the client since I used to work on the game so maybe something changed so it won't keep those settings any longer.

Nasith may be adorable, but he is a brat. Is he getting fat? I haven't looked in on him for a while.