Starting a few weeks ago, FFXI w/ Windower started running much slower than normal. This ranges from about 15-20 FPS in most zones, to 3-5 FPS in certain other zones, even with everything turned down to minimum and nothing happening. In comparison, I used to get 25-30 FPS everywhere even with everything set to max.
This occurs regardless of whether I have any plugins or addons loaded, and gets instantly fixed whenever I load FFXI without Windower.
I'm running on Windows 10 currently.