Limewire returns back to Limewire 4.18?

[Musicianeric]

Okay, i got Limewire 5.5.8 PRO and when i close it completely and i reopen it later on in the day.... It returns me back to Limewire 4.18. I've already deleted it all completely and uninstalled it, but when i download limewire again. It returns me back to limewire 4.18 after closing the new downloaded one. It is starting to make me mad since i wasted my money on PRO and i can't use it. Can someone help me get it to (STAY) on Limewire 5.5.8 without returning back to limewire 4.18 after i use it.