I just updated to Thunderbird 91.3.2: 1.) My last question, that syncronisation eats up the disk space seems to be solved in 91.3.2!! Thanks 2.) calling options (german 'Einstellungen') from the menu freezes Thunderbird and tries to get the complete main memory (in my case 16Gb). See attached image. 3.) trying to publish the calendar to a ftp-site, i get no response and no window to enter user and password, as it has happen in previous versions. Maybe i'm doing something wrong? Thanks a lot in advance, Andreas K.