VST not loading

I tried to lead MUX Modular but got an error and Renoise said that to try again I have to delete a file somewhere, but now the Pop Up won’t display anymore and I don’t know where I have to delete what file.

Can anybody help out?

try a Rescan on the Plugins … menu Edit - Preferences - VST tab
optionally turn on: Rescan previously failed plugins

(if you need runtime libraries) check the website of MUX Modular as well…

Do not delete your computer.