XF 1.1 Rebuild thumbnail

I made migration from vBulletin 4.x but before that i forgot to set a decent thumbnail size in my xenforo. Results is micro thumb.
Now i set a decent new size for the thumb and i wish to rebuild the imported thumb.
Could repeat only the attacchement import step be a solution ?
Ok in case i make again import, what should i delete on xenforo installation side ? Should i empty only the Database ? Or should i erase all, DB, installation files, etc ?

Jake Bunce

XenForo moderator
Staff member
To start over you can empty the db, delete contents of data and internal_data, and run /install. That will be a new install of XF.