The help file also describes where to find
Blue Iris's settings in the windows registry. If you export that path to a .reg file, that will serve as a backup which you can restore later if necessary by simply double-clicking the .reg file and allowing it to import.
Then within the registry editor, you can do a lot of things to narrow down the cause of the crash:
- Try disabling service mode (described in the first page of the Troubleshooting and FAQ section)
- delete individual cameras to see if one of them is causing a problem (or you can change the "enabled" value to 0 for each camera, but that takes more clicking around)
- turn off hardware acceleration (if you have it on) to see if that is responsible. The global hardware acceleration setting is in the "Options" key, and it is named "hwaccel". Set its value to 0 to disable hardware acceleration. If you enabled hardware acceleration on individual cameras, I'm not 100% sure which setting it is.
- or even delete everything under the "Blue Iris" registry key and begin reconfiguring from scratch. I recommend you leave the "Registration" section intact so you don't need to reactivate Blue Iris. I know it sucks ass to start over like this, but realistically it may be one of the only ways to figure out what is causing the problem.