I see that roundcube has updated and as usual with updates, I can not log into my email account now. I keep getting a red message with "Your session is invalid or expired."

I use this email server because that's what forumotion had offered under the Mailboxes in the Admin panel.

Is there something new that I have to download in order to access my email under this company or did I just throw out a bunch of money when I had business cards made up with this email address on it?

Try this log off your forum and clear your browser's cache and history.  Then log back in again.

Nope, nuttin!

I even went as far as deleting that email address and making a new one, still the same story.

Heres the short cut I had bookmarked for logging into my email address: http://webmail.frontiermuzzleloading.com/?_task=mail