There is another post about key bindings related to experimental with more information and any key that was remapped and now shows as being in lowercase in any of the various key binding tabs needs to be redone. Just remap the key or reset to default and remap.

Experimental coming out that has the suicide by right-click fixed along with several other issues but it apparently was released after the end of the business day in GOG so we will have to wait a little while. Same thing has happened a couple of times with the rapid releases of changes, as many as three in a day although two is more common.