Update: I managed to get it working by editing projects.json and databases.json
For now I needed to get this one instance running, did not dig into the actual problem but it seems that the javascript code assumes something about a name atrribute the data in databases.json which is not there with my instance.
Removed all entries but the one I needed and the Desktop is back. Have copies of the original json's if anyone in the dev team is interested in reproducing the error.
at Desktop.89096cbbbdca8c041622.bundle.js:137
at Array.forEach (<anonymous>)
at Desktop.89096cbbbdca8c041622.bundle.js:137
at Gh (Desktop.89096cbbbdca8c041622.bundle.js:137)
at Desktop.89096cbbbdca8c041622.bundle.js:137
at Bi (Desktop.89096cbbbdca8c041622.bundle.js:54)
at vo (Desktop.89096cbbbdca8c041622.bundle.js:54)
at So (Desktop.89096cbbbdca8c041622.bundle.js:54)
at ka (Desktop.89096cbbbdca8c041622.bundle.js:54)
at xa (Desktop.89096cbbbdca8c041622.bundle.js:54)
at vs (Desktop.89096cbbbdca8c041622.bundle.js:54)
at Ts (Desktop.89096cbbbdca8c041622.bundle.js:54)
at fs (Desktop.89096cbbbdca8c041622.bundle.js:54)
at za (Desktop.89096cbbbdca8c041622.bundle.js:54)
at Object.enqueueSetState (Desktop.89096cbbbdca8c041622.bundle.js:54)
at t.O.setState (Desktop.89096cbbbdca8c041622.bundle.js:46)
at Desktop.89096cbbbdca8c041622.bundle.js:21
at g (Desktop.89096cbbbdca8c041622.bundle.js:33)
at Desktop.89096cbbbdca8c041622.bundle.js:137
at Desktop.89096cbbbdca8c041622.bundle.js:137
at Desktop.89096cbbbdca8c041622.bundle.js:137
at Desktop.89096cbbbdca8c041622.bundle.js:38
at Desktop.89096cbbbdca8c041622.bundle.js:137
at dispatch (Desktop.89096cbbbdca8c041622.bundle.js:33)
at Desktop.89096cbbbdca8c041622.bundle.js:137
at async ji (Desktop.89096cbbbdca8c041622.bundle.js:137)
at async Ui (Desktop.89096cbbbdca8c041622.bundle.js:137)
at async file:/Applications/Neo4j%20Desktop.app/Contents/Resources/app.asar/dist/Desktop.89096cbbbdca8c041622.bundle.js:137```
