1.3.1 - BUG - viewer - 'extract alpha channel' always enabled

[user0]

XnView: MP 1.3.1 64bits
OS: Windows 64bit (21H1), display resolution 3840x2160, win scaling 150%

Viewer mode, Image menu
'Extract channel' has 'Alpha' option always enabled

To reproduce:
1. run clean portable XnViewMP
2. open image with out alpha channel
3. check Image -> Extract channel -> Alpha option

Actual behaviour:
'Alpha' option always enabled

Expected behaviour:
'Alpha' option should be disabled if image has no alpha channel

[xnview]

Thanks to your detailed description I can reproduce the problem.

[user0]

fixed in 1.4.0b1

[xnview]

This problem is supposed to be fixed in XnView MP 1.4.0. Please check and confirm the bug fix here.

[user0]

fixed in 1.4.0b1, no regression in 1.4.0