In JBIDE-12826 we described how we'd stay compatible to old username based settings for project- and connection settings. The project settings are handled correctly but existing connections are not loaded as described:

connection list (connection pool, that's also used by the OpenShift Explorer):

• The current key/values only use the username. Migration:
• we keep the existing preference key/values
• we create a new preference key
• the connection pool is loading the old and new preferences
• the connection pool is storing the connections that define connections to the default server to the old preferences