On macOS I downloaded spine 3.7. When I go to export -> Json then Browse folder. Ancient low res browser is opened. With no shortcut facility and backbuttons etc. Browsing folder is a pain if you have to export alot of files everyday. This wasn't a problem in previous versions.
Happens for options Json, Binary, JPEG, PNG
BUT : Latest browser with all option is open if you browse file on GIF,AVI or QUICKTIME. I hope this helps thanks.