I think there is a bug in the nightly2 with regards to the entry in the Accounts app. For example, i wanted to delete the wazapp account from the Accounts but no matter how much i clicked on the entry, the applet wouldn't open.
Using apt-get purge and deleting /home/user/.wazapp and /home/user/.cache/wazapp then rebooting before installing the nightly again would still have the same issue.
However repeating the purge steps and then installing v0.9.13 from tgalal allowed the applet to open and able to delete the account.
Of course the above is what I experienced so if possible maybe someone else can verify it...
Nightly4 seems to have resolved this at least partially. The applet now opens up but only after waiting for 20seconds...
Those jokers unable to find nightly4 in dropbox, look properly... There is the proper nightly4 in the middle of the list which you are supposed to use and the dbg version in the end of the list...