[Evolution] Backup and Restore Problem

["Richard F. Gillette" <rf gillette ieee org>]

Evolution V 2.2.8.1 (I cant document however it most likely was not a
problem in older versions.)

I have been using backup and restore to transfer all evolution data from
one CPU in one location to another CPU in another location and it has
worked fine.

However now when I backup Evolution on CPU 1 (to a portable Hard Drive
or a flash drive) and do a restore to CPU 2, I receive an error
message: 

"Invalid backup file--- Please select a valid backup file"

The file saved is self labeled: evolution-backup.tar.gz 

That is the file that I used to use for a restore on the other CPU.
Has there been a change and if so how do I do this now or can someone
tell me what I am doing in error?

I just trier to backup and restore from Evolution on my netbook and
restore to the same netbook and received the same error message!

For what it is worth:  The user guide 1.3.1 line 2. states to select the
evolution-backup file desired "evolution-backup.tar.gz" and click
"save", this is an error as "open" or cancel are the only choices.

I do have the "backup and restore" plugin enabled.