Compilation failed error

I am using Real Studio 2012 R1 with Windows 7. I am not familiar with XOJO. I am assuming that it is a simple
name change from Real Studio. I had not used my software for a couple of years. I recently decided to make a minor
change to one of my programs and received a "Compilation Failed. The message said that Plugin:RBAppearancePak.rbx:0
shares the same filename on disk as another plugin. Please contact plugin vendor and ask for an updated version. I did a search
and I fave no file with that name. What is my problem? Do I need to purchase new software to get rid of my compilation error?

Any advice would be appreciated.