Unfortunately, no. By returning back to a snapshot, you lose all work done since this snapshot was taken. The only workaround is to reconstruct your system's state from a backup.
Most VMware products with the revert snapshot feature have (or will have in future releases) a warning message to alert you before you click OK and proceed with reverting to a previous snapshot.
Some versions of VMware Workstation (up to 5.x) allowed you to disable this hint by selecting the Do not ask this question again checkbox in the Revert To Snapshot dialog box. To enable the hint again, go to Help > Hints and click Show all hints. Do not select the Do not ask this question again checkbox in the dialog box the next time it appears.