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
This old bug may not be relevant anymore. If you can still reproduce it in 8.2 development builds please reopen this issue.
Thanks for your cooperation,
NetBeans IDE 8.2 Release Boss