Hi Ilya,
Here are the links to the versions 2.79.6 and 2.79.7 of Blender I use :
release Blender 2.79.7 :
https://download.blender.org/release/Blender2.79/latest/
File to download : blender-2.79-e045fe53f1b0-win64.zip
Blender 2.79.6 version by Yuri Unt:
File to download : http://cgstrive.com/blender/Blender2_79_6_wn_cgs.rar (link located at the top of the thread). May be this link is unavailable, but I can provide the .rar file if necessary.
It seems to me that you have used this version ? According to the video “Bevel After Boolean v 0.2.2.mp4”, here : https://blenderartists.org/t/wip-bevel-after-boolean/693072/688
In this video, BaB 0.2.2 works with Blender 2.79.6, OK, but it’s not the same context as mine: the video shows a bevel for a boolean intersection, and not a bevel made with a loop of edges : this case fails with the “couple” Blender 2.79.6 (or also 2.79.7) and BaB 0.2.3 (or also 0.2.2…)
Thanks for your help !