Hi John,
Sorry to hear you're having problems. Changing between the modes will load the different settings for that mode (so if finder is in 'auto adjust' and video is in manual, changing from finder to video would set the stretching to manual. However, not being able to check the auto adjust box is a bug. I haven't heard of this happening before, and I can't think what might be causing it. Could you send me some times where it happened on the video so I can see it for myself. If you can send the following directory to support@atik-cameras.com that would be very useful:
C:\ProgramData\Atik\Infinity
ProgramData is a hidden folder, so it’s best to copy the address and paste it into file explorers address bar. To send the folder, ‘Right Click the folder -> Send to -> compressed (zipped) folder’. This will create a zip file, which you can then attach to an email and send to support.
Chris.