I built a new M2.3.5 site and after migration, I moved it to replace the M1.9.4.4 install.
I have gone into Softaculous and it recognised that it was a different version and updated is, but the admin directory was picked up as the default admin123 not what it actually is set to!
Also, when creating a staging version it copies only the app, lib and var directories so doesn't actually work at all.