Reset to default theme in myphp?

[WantSome]

Forum version 2.0.17

I haven't been able to access the themes area of my forum to change the theme settings.  There are a few errors popping up in places which I would like to try fix or figure out but under normal circumstances I would switch to the default theme to see if the issue still exists.

I just can't.  Not through admin panel and not through my profile.

Is there a way to set myself, or reset everyone, to the default theme through myphp admin or the server somehow?

Thanks

[Arantor]

You can add ?theme=1 to the end of the URL (or, &theme=1 if there's already a ? in the URL) to temporarily switch yourself to the default theme.

[Illori]

What is repair_settings.php?

you can use repair_settings.php to do that as well.

[GravuTrad]

Hello.

And to switch to another one that the default theme? (a particular one already installed)

Is it possible by mysql? (phpmyadmin)