Martin
Any way you can send me a screen shot of what you are seeing? I'm a little confused about what you are describing.
Or maybe, a url so I could look at things myself--assuming you have it online somewhere...
As for the login, could you look in the mbase folder inside your site folder and particularly the email and password pages. You should have an entry like admin:
so...@email.com and admin: mypassword respectively.
I noticed a mistake in the init.txt file used by the start screen that set the default $BOLTadmin value to "1000" rather than the correct "admin" value at some point when reworking the new membership system, and that could definitely be causing issues. So you might want to check your index.php file and verify it also has the $BOLTadmin value set to admin. I've fixed the init.txt file for the next release, but you can fix that also now to do more testing.
Note you can login using either the email or the member id. Which would normally be "admin" or some number like "0012" (12th account, after superadmin). That is, you don't have to use the email to login, as long as you know the id.
Also, in the next release, I'm going to add a line of code to the start.php script so you can choose an alternate superadmin account for a little bonus security. Just go to the site creation page and then add &admin=whatever to the url. Then create your site as usual. The new "whatever" id will be used for your first account.
I'll be releasing this and some other fixes soon...
Cheers,
Dan
PS. Let me know if fixing the login issue resolves any of your other problems.