postgresql databases disappearing and reappearing and disappearing on localhost - Postgresql x649.3 on Windows 8.1 (64)

I am using postgresql 9.3 with pgadmin III, and Access 2013 as a front end
for data entry using (ODBC connection) linked tables, on a Windows 8.1 (64).

I have one main database I am developing on a localhost:5432, with four
other test databases I had on the same localhost. A few weeks ago the four
test databases disappeared from the list in pgadmin III and using the shell
command to list the databases, only the main database showed up.

A week ago, the four test databases reappeared and were apparently
functional (in pgadmin I viewed the tables and they appeared fine). I
turned off pgadmin and restarted, and the four test dataabases disappeared
again.

Today, I turned on pgadmin and the four appeared again - I took a
screenshot to confirm I am not hallucinating (!). Again, I turned off
pgadmin, and restarted and they disappeared again.

Any ideas what is going on with my psotgresql set up that is causing this?
Attached are screenshots of the six databases listed earlier and the two
listed after the four disappeared.
Killian Driscoll
Banting Postdoctoral Fellow
Département d'anthropologie
Université de Montréal

umontreal.academia.edu/KillianDriscoll
www.lithicsireland.ie
ca.linkedin.com/in/killiandriscoll