Using 0.39 Beta with 2080 Ti FTW3 (11G-P4-2487-KR) and select for the GPU temp to be shown in the taskbar. Click apply and save. It loses the setting each PC restart.
It also shows a massive font that doesn't display properly. Running alongside Core Temp 1.12.1 and it screws up the fonts for it as well.
-N.