I am converting an XNA project to Monogame. When I use the Import function in the MCPT, I can read in all the content and also build it. But when I Save, the imported items do not show up in the Content.mgcb file. So next time I need to build, I have to Import again, and also have to make any changes to individual content item settings again.
Well, it looks like another .mgcb file was created for some reason. I think I can make it work now.