Unable to upgrade from Beta 2 to Beta 5

[tciuro]

I understand that this might be not an issue with your tool, but might be interesting to other users.

I had upgraded my Mac with Beta 2 using your excellent tool. Then I learned that Beta 5 was out, so I gave it a try again. Only this time the installer refused to recognize the destination (where Beta 2 was installed) as a valid destination.

I'm not sure if there's anything that can be done, but other users may want to know this.