Backup & Restore is the right thing to do.
To reset to the default configuration the steps are the same as in your previous thread.
The 9.1.1.3 default configuration will work in 9.1.1.5. I don't think any of the defaults changed between those two versions, either, so you can consider it a 9.1.1.5 default config export as well.
The latest version of the manual comes in HTML Help format with the program (push F1) and can be downloaded in PDF format from the GPSoftware website.