So I have a project that has something like 15 projects, and sometimes don't want to rebuild all of them. So I tried to create a new configuration and then choose not to include other projects, but I couldn't change anything. I couldn't uncheck anything, change a dropdown value, etc. Why?
Basically, if you have two monitors, there are cases where the popup box is in the 'wrong' monitor. Move it to the other monitor...voila. Works. Why? Who knows. At least this work-around works.