Option: Mark messages as Read when moved to Trash

my current version 10.0.3447 (d250ce6), I have the “Option: Mark messages as Read when moved to Trash” enabled, but it is not working.

What else could be interfering

It has not worked for me in Version 9 or 10.

Why not try to do the easiest thing first — upgrade to the latest build? It’s 10.0.3530.0 now.

Thank you, did not realise there was a newer version. I have updated to the latest version and it is working.

Thanks