Neo4j Desktop 1.3.8 : "Failed - not a valid password" after using 'Reset database password'

From the desktop application I went to database>manage>administration.
There I filled in a new password (I tried several) and pressed 'apply'. After restarting the database I get the following prompt: Local Graph password has been changed. Please enter Graph password:. When I fill in the new password (I also tried the default, neo4j) I get this error... Failed - not a valid password.

I can still run the database with dbms.security.auth_enabled=false, but I just want to figure out how to get this fixed. I tried all sorts of solutions. If someone could help me set this up correctly that'd be very much appreciated.

edit note: Everything worked the previous days. After the last pc restart it suddenly didn't anymore.

I asked this question on the neo4j forum (here) and got a response from wookiefrits with the following instructions:

1. Disable authentication in your settings by setting:
   dbms.security.auth_enabled=false
2. Then all you have to do is to go to your Neo4j Browser and paste this into the shell:
   ALTER USER neo4j SET PASSWORD 'mynewpassword';
3. set dbms.security.auth_enabled back to true