Guys I just posted in another thread, a combination of options from the Joomlapolis Forums and other discussions;
If you have CB installed or another non-Core login/registraiton module, unfortunaltely this has become a known issue....
You will need to temporarily downgrade from 1.0.13, again, unfortunately, this is not too easy to do.....
Ok, here some help to reset access to your joomla system:
Method 1: Easiest:
Click lost password in front-end, enter your admin username and email (if you remember it) and check your email
Method 2: Well, a little less easier:
a) Go to database admin (e.g. phpMyAdmin), and open database.
b) Find table jos_users
c) Find your admin entry (by search by username).
There you will see a password looking like:
1023456789ABCDEF1023456789ABCDEF:1023456789ABCDEF
<<<< Notice the " : " d) Find an online md5 generator like here:
http://www.iwebtool.com/md5 e) Type-in a temporary password, and
write down the md5 hash. or Copy and paste in to a text document.
e.g. md5 Encryption for the word '
example' is: 1a79a4d60de6718e8e5b326e338ae533
(you could use this as temporary, but change it as soon as you can).
f) Edit the entry in SQL, and change password column of that entry to the one above for password 'example'
or to the one you computed, or the old one from backup (notice: no ':' in it...)
Method 3: a) Alternatively, you could copy the md5 password from another user that you register in frontend
or of which you already know the password.
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The Joomlapolis Team are working on a compatible version currently, the upcoming
CB 1.1 will be compatible with joomla 1.0.13.