No Easy Way To Rename Bad Extensions

[schmidtp72]

Feature Description
While CZKAWKA can find bad extensions, it only gives a list of them. The only options are Select or Delete (or am I missing something)?
Can you add a "Rename" button to automatically rename files to the correct extension. It's OK if you only have a few wrong extensions but anymore than a few (especially if you have 500) doesn't make changing each feasible.