Tour of duty cant open files via map-or scenario editor

[Rabbit]

Perchance might you be accidentally using the Scenario Editor from a different SB title to try to open the Tour of Duty scenarios?  For instance, I was able to get an "Error reading file" message if I started the Scenario Editor from the AotR title and then tried to open one of my ToD scenarios with it.

Otherwise, I just tried opening a couple of ToD scenarios (such as #Started.scn) using the ToD Scenario Editor and didn't have any issues, so there doesn't appear to be an issue with the stock version of ToD.  So unless it is something odd like you are using the wrong Scenario Editor or trying to open a custom scenario, I tend to agree with Embis in that you'll likely have to do a reinstall.