Best way to pause Vembu BDR

I am currently running Vembu BDR free version and backing up 3 VM's (hourly incremental) from a Hyper V host. I have a nightly window where I export these VM's and this seems to cause problems with both the exports and the Vembu backups, as I see errors in the backup log. What would be the best way to put a 2 hour pause in the schedule every night? Can I run a scheduled task to stop the client service on the Hyper V host (or conversely stop the services on the Vembu server)? And if so, which services should be stopped and restarted on the client or server? Thanks.

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