Hi there,
this is no issue at all, try following this steps, they should work almost identical to what you need.
https://discussion.enpass.io/index.php?/topic/31585-clean-install/#findComment-91490
Also after you've done the backup, go into your vault and click disconnect. Afterwards if you click Connect you can choose a new location to sync to from your PC, therefore changing it's default Cloud Sync.
Hope this helps.