Samsung UF-80DX Software User's Manual page 36

(9) Stop
Stop button will be activated when capture process stated, you may save AVI file
safely by clicking Stop button.
(10) Exit
Exits AVI capture program.
✔
Notice : 1. While capture processes, Do not turn off power of the
2. While capture processes, [Exit] button would not finalize
3. AVI capture program and USB Viewer program aren't
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presenter or remove the USB cable off the PC. It may
cause the presenter or the PC to make trouble.
AVI file. For saving AVI file safely, Push [Stop] button
first.
executed at the same time.