Replace text with JS

In one plugin I need to change text, they don't have proper strings in order to just translate it. I can edit directly the PHP code, it works, but is very though and surely I will lose in a future upgrade.

That's what I need, if I could do it via CSS editing would be very easy and safe from updates.

https://www.lumi**.online/wp-admin/admin.php?page=ihc_manage&tab=notifications

you can see the text: "Ultimate Membership Pro", but can not change the text itself.