''<p>spiridon1208 [[#question-1449651|said]]</p>'' <blockquote>Hi all, Sorry for asking again, but after reading all the posts here the problem is still occurring. </blockquote> This is your first post in this forum. https://support.mozilla.org/en-US/user/spiridon1208/ <blockquote> When I launch Thunderbird, I'm asked for new data (Account Setup), like there is no profile available. The application seems unable to locate or recognize my existing profile, but the profilefolder exists and its almost 90Gb of data. Should I complete Account Setup windows with my data? Please help me! Tried with '''thunderbird -p''' command to repair or select another profile but with no success ! - installs.ini Default=Profiles/xxx.default Locked=1 - profiles.ini Default=Profiles/xxx.default Locked=1 [Profile0] Name=default IsRelative=1 Path=Profiles/xxx.default Default=1 [General] StartWithLastProfile=1 Version=2 ''User Agent Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:115.0) Gecko/20100101 Thunderbird/115.11.1 OS Windows_NT 10.0 19045'' Thank you ! </blockquote> I get nothing from that as I have no idea what the profiles were names before you converted them to XXX. Were they the same or not? Were the the same folder name as the one you are trying to force Thunderbird to use? Does this "profile folder" even contain a prefs.js file? Size is not relevant if there are no settings to load the profile with.