While I get my htaccess file sorted, I thought, copy database and start to test - that went all ok
But no one can login. Keep getting password incorrect. Tried main super admins, and not normal users passwords that I know. Proved it by going back to main site and they worked all ok there.
Checked FAQ, not seen this, so not sure if related to my htaccess file or something else.
Everything works if I move it to a subfolder of my root, just not to a subdomain.