Upgrading to 2004 - another question

Oh my head! Don't I hate upgrading during a project... (~:

Question: I had the NetDev PHP user authorization extension installed in
DWMX. It was outdated. I decided to upgrade to DWMX 2004 because I read it
was built in.

I imported most of my extensions from DWMX to 2004. I forgot to uncheck the
DevNet extension. Does it overwrite the built in DWMX 2004 server behavior?
It's not working at all now, not even the log in behavior. Before the login
behavior worked but not the 'restrice access to page'. behavior.

If I go to the extension manager and uninstall the DevNet version will I be
able to use the DWMX2004 built in behavior or do I have to reinstall DWMX2004
again?

Thanks. Leesa