In MatrixALM you can tag any version in the project. In the enterprise edition you can restore a project including its history up to such a tag.

To tag a version you can go through the audit log, see Restoring Projects / Branching Projects (in the past) for more info.

You can view tags in the tag tab of the client.

Look at the following video to see an example of a project restore as it was at a specific moment in the past: