Can I skip versions when I upgrade?  ie I have V6.01 now, can I go straight to V10.01?

No.  Each version of the MailCOPA email program updates your database and this needs to be done in sequence.  Follow the instructions for upgrading to each version from the one you have.

The sequence is

V6.01 -> V6.02

V6.02 -> V7.01

V7.01 -> V8.01

V8.01 -> V8.02

V8.02 -> V9.01

V9.01 -> V10.01

All updates newer than V6.01 are available to registered users free of charge.