Deleted main admin account...

By Rho

So...the main admin of an elgg site I put together deleted their account. I can still get access to the site, but it appears that there are now many issues with various plugins, etc.

What's the best way to restore the site to how it was with an Admin account, or do I need to go into the database and do this?

Any pointers would be very welcome as it has come a bit of a shock to the previous admin!