Well I thought it would be obvious?
Lowest is era as the lowest game is era
Mid number is classic, as the mid game is classic
Highest is retail, as the latest game is retail
People have said that for the last week and over 7 updates and it never has had it. So they sell an incomplete guide and now less than 5 days to use it
The latest is winrar 7 and you choose not to update and extract a new file with old software. As that version is over a year old.
Try 7zip as it is free
As I said what did you extract it with and where?
Seeing why you would you need to use /rxp if it would show in game anyway. If it was installed to the right location
Sounds like you did not extract it with the right software.
Seeing people refuse to update their software and try to extract a new file with old or the wrong software and wonder why it does not work.
Is it even installed to the right location?