Hi Diptee,
If you go to Manager (I'm using the Classic version) you should see an option 'Snap Packs' on the left hand menu. After clicking that you will see a list of all the snap packs loaded to your account and the current version. If you have auto-update enabled then they should all have '(Default)' in the name. You can simply use the drop-down to select another version. It may not be straight-forward to identify the prior version so if you look at the documentation for the snap you are having problems with, right at the bottom is a section showing the Snap Pack History and from there you can see the prior version and when it was last updated. Just be careful though, that once you change the version from the default then it will stay as that manually selected version and not be updated when the next version is released.