Hello. Is OEM Kis 6 Key compatible now with KIS 7 ?

The answer as far as I can tell is that it depends on the OEM key - 4 of mine had no problem but the earlier one wouldn't work so I had to get a new key from support after pointing out that the license agreement on the disk specifically included upgrades and supplying proof of purchase.
If you open the key file with notepad and it doesn't mention OEM you're OK if it says OEM then you probably need to get a new key