Customizing URL /?Permalink in Ultimate member plugin

After 10 month and 3 weeks I’d like to bring back the question.
Why, because I wish that Ultimate member came to their senses and realized that having the “user” term in your url when you are a vendor or else is not looking good at all. We need to get to choose between : sitename.com/username – and even – sitenamUltimate membere.com/ourchoiceofword/username ?
The plugin is great so far but seriously only for this it is close to a deal breaker. There must be a way to customize it. Meaning not only changing the ending, I mean taking it all down and even replacing it by our own choice.
Other plugin are capable to do so, so I guess it is not complex enough for them… The problem is also that your plugin is taking over. So it is ruining it for this part. This could also be a solution for you. If it is too complex for you to make this happen, code it so if there is already a plugin taking care of this Ultimate member should not bother…
Please help.