[kh99]

I don't think there's any way to do it without changing the database. You could use phpMyAdmin and look at the datastore table where the title is 'maxloggedin' and change the 'data' column. It's in serialized format, but if you just find the current number and change it to what you want, it should work.

If you don't have phpMyAdmin or equivalent, you could do it with a query like:

UPDATE datastore 
   SET data=REPLACE(data, 'a:2:{s:9:"maxonline";i:XXX', 'a:2:{s:9:"maxonline";i:YYY') 
   WHERE title='maxloggedin'

where you would replace XXX with the current number and YYY with the one you want.