Here is a full error details of why my current project is not listed in the project palette. Note: As a prerequisite, I uninstalled 6.8 and removed its user settings directory so that 6.9.1 doesn't depend on it any longer.
So I did this: I went to the server palette and tried to start app engine. Here is what I got:
A java.lang.NullPointerException exception has occurred. Please report this at
http://www.netbeans.org/community/issues.html, including a copy of your messages.log file as an attachment.
I have attached the log file below. When I toggled on the show details button, I got this:
[catch] at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1957)
Please find the full stack in the attached file.
Created attachment 106188 [details]
Full error stack from NullPointerException