Upgrade without the need for a backup

Upgrade without the need for a backup

I am attempting to upgrade Service Desk Plus from version 9049 to version 9100 without being forced to carry out a backup. Due to availability of a VMware snapshot and a backup of the SQL database, I feel there is no requirement for the automated backup to be carried out during the application update. This adds many hours to the process.  
 
I have already altered the 'UpdateManager.bat' file with the addition of '-DSDBackup=false', following advice from previous posts. As a result, I was presented with the OPTION to backup during the upgrade from version 9016 to version 9049... which I successfully declined. The upgrade to version 9100 though, does not provide this option (instead presenting a single OK option to continue and thus kicking in the lengthy backup).
 
We have a very short window to carry out the upgrade, as the application is used around the clock. Is it possible to upgrade from version 9049 to version 9100 without the need to backup?
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