Snapshot Pro leaving zip files and now not working

Good morning Heroes, I am using the Snapshot backup to save 3 backups to the cloud storage at WPMUDEV. Unfortunately the plugin was leaving multiple "prep" zip files, ie the ones created by the plugin before upload to the cloud. The hosting company has said our contract will be revoked unless we stop doing this and has deleted all the old zip files, rendering (I think) the plugin inoperative. So the question is ... How can I prevent SNAPSHOT from leaving files on the server. 1 only zip would be permitted but I can't find where in the Plugin to set this for my existing backup. Can you offer some advice please?
Warmest regards Ron