If you have the "Store" version of MusicBee it cannot be patched.
I have been running the 3.5 version of Music bee...also the above patch did not do the trick this time.
There are 3 different versions/types of 3.5.x MusicBee--the Installer, Portable, and Store versions. In the Help/About dialog there is an abbreviation after the version number that says what type you have.