Hello,
I've done some tricks to make WPP to act like I want; this may be useful for someone with my same problem.
So, the problem: the function get_mostpopular() returns a string, with
<ul><li><a> tags; I want to let have a class like "current-menu-item" in order to make it bolder (or what you want to do, that's doesn't matter).
First of all in function.php create something like this:
[Code moderated as per the Forum Rules. Please use the pastebin]
You can customize the function like you want, taking help from the original get_popular_posts() (the one used by get_mostpopular() that returns the string).
In one of the template files (i've used sidebar) you can invoke our function:
[Code moderated as per the Forum Rules. Please use the pastebin]
Naturally this is MY semplification, it will be good if plugin's owners makes this changes as default; I think it's better to return an array to let you play with it as you want.
Hope to help someone.
Cheers.