Then you risk this end user scenario:
1. You start Sonar and receive the warning message about your settings
2. This makes you realize that one or more of your external drives are not connected to your system
3. You click "Continue" to proceed into Sonar (without it making any changes to your previous paths)
4. You
don't plug in in / power up your external drive(s) *before* playing or editing anything..
5. You attempt to make some music...
6) Sonar crashes
because you forgot to plug in your hard drive or
you didn't wait long enough for windows to recognise the hard drive.7) You post in the forums - Why did Sonar crash?
That's why there isn't an ignore button... You need to plug in your hard drives before you start Sonar otherwise it will look elsewhere, or it will crash. This isn't much different from any other Windows application.
Cheers...