If you are connected via MAtWorx, look at the top line. It will show you what software level you have. It should be a letter + number combination. EX: P1 1.04.
You can also go to the MOC mode and look at CMD F85>FF03, FF04 to find the same information.
If you have an older IVS system, then you must use the MOC mode and CMD F82>0,1 to get the version.