This application is for use with extracting information from DLL's, EXE's, and possibly TS TSX plugins. However, because a TSX is simply a renamed DLL it'll have to be renamed back to a DLL to use with this utility as TSX files with the TSX extension are not recoconized and as a result not openable until you rename the file. I started renaming some TSX's to DLL after copying my TSX folder to another location to avoid altering the original TSX plugins. To open the renamed files I had to disable the read only box in the file properties dialog. Once that was done I was able to view the contents of the file in the decompiler. A lot of the information looks like Greek at this point, but if you open the file as PE and click the blue I icon you can view some neat stuff like the imports and export information that references the TSXAPI.DLL to see TSX related calls from the TS SDK related names.
PS: If anyone has any luck please post a tutorial on how to use the application for the rest of us and I'll do the same as I figure the thing out myself. Cheers.