all my database servers (postgres) got disconnected and does not appear in the dropdown in the solution explorer. Any help to get them back up?
So you don’t have any child nodes at your “Database Servers”-node in your solution explorer, but they existed before?
If that is the case then the connections seem to be removed. You can add them again by rightclicking the “Database Servers”-node and choose “Connect to existing database → postgresql” and enter the details. Given that the databases itself are still there.
The database servers list is stored in “[servoy folder]\application_server\servoy.properties”. If you have a backup of that file anywhere, you can go ahead and restore that, or you can even copy and paste the necessary values from the backup file and paste them into your current servoy.properties file.