The Umbraco 8.1.4 release contains an unintended breaking change, that can impact users of Models Builder in combination with media pickers. Read for more infos about the problem, and workarounds.
After a 7-to-8 upgrade, or maybe a 7-to-8.0-to-8.1 upgrade, some media folders stop showing in trees in pickers, or the left side of the media section.
The Models Builder Custom Tool is dead, long lives the Models Builder Extension!
Proposing a replacement for the SolutionStartPage Visual Studio extension which, unfortunately, cannot work in Visual Studio 2019 anymore ;-(
Or, why I have always prefered the Atlantic to the Mediterranean.