API

I have a problem getting a valid API key to use. I have one for a different account I registered a while back, but it won’t work with the site I am currently using and when I try to get one with this account I’m sent straight back to the old one. The site isn’t hosted by wordpress so what do I do? I need the API key to get a plugin to work, but it tells me I can only have the old one that doesn’t work.
I get a notice to deactivate the plugin till i get the API key.. GRRRR.so aggravating.. Any ideas and/or suggestions to resolve this?

Thanks