I try to open the program and I get the create new file, back up, or combine (I belive because the program won't even let me back up and seems locked) It worked just fine the last time I opened it but now nada.
I suggest rebooting, see if that fixes your issue. If not, try a repair of your installation which is done by clicking the change/remove button next to Logbook Pro in the Windows Control Panel Add/Remove programs area. Select Repair on the next dialog. Also confirm you are using the latest version which is 1.9.9?