How do I know which version that I can use?
I guess that shoud be a old version because verry old machine.
The diffrent extension I have on the old backup I have recieved is
Program.xml
Program.xdm
Program.XEF
Program.STU
Program.CTX
Program.BAK
When I try to open it with Unity Pro XL V12 I get this error.
https://www.pixeltopic.com/image/neluwzigpbzirgw/
Is it safe to upgrade or should I look for version 3.0?