What is configured when you click Tools > Options > Associations?
Does your dialog look like mine?
Click the image below for larger view.
Helpful and Handy Links
On other thing I forgot to mention. I uninstalled RoboHelp and reinstalled it, but that didn't help.
The part marked in red is the same on my computer. But, the "Use Default Editor" radio button at the bottom was not selected on my computer. I selected it and now it works. Thanks!
The strange thing is that I checked the other computer earlier and it also does not have the "Use Default Editor" radio button selected, but it's working okay.
Anyways, problem solved. Thanks!
Thanks from me too (RH7). My problem was also the incorrect radio button selected.