Thank you for your post into the forum.
The current version of SQL Backup, V18.104.22.168 with the V22.214.171.124 patch, will allow SQL backup v6.5 to operate with SQL Server 2012.
V126.96.36.199 can be downloaded using this LINK
The V188.8.131.52 patch can be obtained using this LINK
You need to be aware of couple of things that may catch you out.
The first is that you will not be able to deploy the SQL Backup Server Side Components directly from the GUI. Once you have installed the V184.108.40.206 GUI, locate the Server components installer file SQBServerSetup.exe copy it to the SQL Server 20102 machine , if not already on there and run the exe file.
Second, you will need to have a Windows account available for the SQL Backup Agent service to use prior to running SQBServersetup.exe. SQL Server 2012 will not allow the user account specified for the SQL Backup Agent service to be a local system or NT Authority\\System account. Also the Windows account you specify must be a member of the sysadmin fixed server role.
SQL Backup V7 is currently in development. SQL Backup V7 is expected to be released mid to late April 2012. Sorry, I do not have any information as to an exact release date. You can download EAP versions of SQL Backup V7 from this forum post
if you wish to try out SQL Backup V7 and see the new features prior to it's official release.
I hope the above answers your question.