Hello,
Thank you for your message.
There is the current stable version 6.8.0.1 available from the regular
download page, and a new
beta version. In a few days we are going to roll out the final 6.9 release and this new version will replace version 6.8.
Unfortunately, we do not provide earlier versions. We always recommend that you use the latest version, on both sides (Viewer and Host). Otherwise, we cannot guarantee that the bug you may encounter is something new and not just a known bug that is already fixed in a subsequent update.