You can manually upload dSYM files by dragging and dropping them to the dedicated region in Settings->Crashes.
The version number in the settings screen will be updated when the first crash log for a session running the same build is generated. Note that when symbolicating a crash log, Appsee requires an exact match between the app build’s UUID with these of any of the available dSYM files. Xcode’s IDE names each build & associated dSYM with a UUID, so any change to the code will result in a new build will overwrite the existing one (this is also true for dSYM file)