[fix] AppImage advanced settings location (#3866)
[fix] AppImage advanced settings location (#3866)

Reported on the forum by roger64: https://www.mobileread.com/forums/showthread.php?t=296184
NiLuJe/koreader,NiLuJe/koreader,Hzj-jie/koreader,houqp/koreader,Markismus/koreader,pazos/koreader,koreader/koreader,mihailim/koreader,mwoz123/koreader,lgeek/koreader,poire-z/koreader,Frenzie/koreader,koreader/koreader,Frenzie/koreader,poire-z/koreader