Hi zahnartz62,
Forgive me if some of what I write is already clear to you.
I don't understand "Google to several options all seem to be by Igor Pavel"
anyway ....
Try
http://www.7-zip.org/
This offers a 32 bit and 64bit program at the top in a box for rar files.
Select the version that is the same as your computer operating system.
XP mostly is 32bit [but can be 64 bit also]
Windows Vista is more likely to be 64 [but but can be 32 bit]
Windows 7 is most likely 64 bit
This 7-zip program should download quickly. It should not take very long.
Find it and install it onto your computer.
I assume you have downloaded the Cliffs of Dover patch to your computer also.
If needed, you can get the latest RC patch here
http://airwarfare.com/sow/index.php/...tional-version
And this link is a step by step on installing the beta patch
http://airwarfare.com/sow/index.php/...f-beta-patches
Sadly I have had problems with the launcher not working so I wish you better luck
Hope this helps.