If you use manager upgrade(file>advanced>upgrade system password is password) it will show version your system can be upgraded too (although it is somewhat crpytic it doesn't just say 9.1, at least not on the older versions). Since you have no licenses, I would not suggest going above R7 unless you are OK buying an essential edition license. Basic is garbage and should be avoided at all costs. The cards will upgrade to whatever version you have on the control unit and if they work on R5 they should be fine on R7.