MP 0.26 Win32: Nag screen when opening 16bit tiff files

[Ihmemies]

Every time I open a 16bit tiff, following popup appears:

Ask
This picture will be converted to RGB with 8bits per component

[ ] Do not show this message again.

Ticking the box does not help. The message shows again every time I open a new photo... I only want to see photo

[xnview]

Please check XnViewMP 0.30