You will need a program like
WinZip to unzip .ZIP files.
You will need
WinRar to join .RAR files.
The OCC forum does not provide support .RAR files and we don't encourage people to upload them. That's why that extension is not one of the ones you allowed to upload.
If you have a file larger than 10MB you would like to share, please do not split it up with WinRar or HJSplit. The best way is to upload it to our
FTP Server and perhaps we will use it on one of our monthly updates.
Thanks,