multisite plugin locked me out of my single site install

Hello!

First, I want to emphasize that I realize this problem is 100% my own fault for not being more careful and a) backing up the site and b) reading your description more carefully.

I installed Dashboard Widget Order and now I’m locked out of that site and can’t remove it. Luckily it’s my “sandbox” site where I play around with things. If I delete it and start another sandbox.

I’m writing to suggest some sort of installation or activation warning that would detect if an installation would conflict with the site.

Again, I realize this is completely, unambiguously, my fault.

One more question. I’ve got a number of different usernames here. kenn_fong4 is currently the master account. How do I delete the other account(s)? I want to do this because their existence blocks me from using my preferred email address, which is Kenn@KennFong.com.

Thanks, kenn/