Hi,
Make a full clone of your current VM (menu -> "VM" -> "Manage" -> "Clone" -> follow the wizard, do not create a "linked clone" but instead "full clone" in one of those screens)
Then rename the folder of the original VM before you throw it away to make sure that there are no dependencies left.
There are other ways to resolve your snapshot history, but making a clone does not require any low level steps and diagnostics.
--
Wil
