My guess it is zip’ping the directory in memory to send it as single zip file, hence use a lot of memory. Better to zip/tar directory yourself and send that file over.

Based on screenshots - the status in Process tab is useless in most cases IMHO. Better telling would be CPU℅ telling proportion of sleep&running.

But overal nice looking, having tabs like flatpak and such that sounds useful.

Just go to the settings, apps, Tusky app and click “open defaults” or something default dont know how its called in English. It will unset all default targets of that app.