Get mintMenu 5.5.3 from here, this bug should be fixed there.
I don't see 5.5.3 or 5.5.4, just 5.5.1 and 5.5.5. Looks like 5.5.5 was pushed today (May 6). The mintmenu change log seems devoid of meaningful information. How do you know the problem I am discussing is fixed?
I am sure this information is available in the forum or a wiki, but what is the proper way to manually install updates such that the package managers do not get confused. Providing a link is fine.