I have just downloaded and installed Modeler 6.5 and running locally, it looks like the Application title defined under Navigation is being ignored. It is titled as Mendix 6 - XXX in the browser, instead of the correct application name as defined. I have not yet tested in a deployed application under Windows Service Console. Has anyone else come across this?
This is a bug, unfortunately. 6.5.1 was just released and solves this issue.