OS: Windows 10 - 64bit
To reproduce:
1. Select any image, or multiple images.
2. Press Ctrl+U to convert.
3. Select a cutom output folder.
4. Click the convert button.
Actual behaviour (bug): False error dialog is displayed ("Delete original option is enabled...").

This option is actually disabled, I have the same dialog even if I enable this option and then disable. Original file is NOT deleted if I click OK.
Expected behaviour: No such dialog should be displayed if the option is disabled.
There is no such dialog in v0.86.