If the application cannot be started anymore it could be because of the config file corruption.
To manually reset the config files please delete these two files:
config.json
ui.ini
From the below directories:
Windows:C:\Users\USERNAME\Local\NobeOmniScope​macOS:/home/users/USERNAME/Library/Application Support/NobeOmniScope
Nobe OmniScope should start with factory settings after that.
If the application still crashes it might also require resetting your saved layouts. Simply create a new one from scratch.