JabRef 3.6
windows 7 6.1 amd64
Java 1.8.0_111

Reset preferences and Import preferences does not work for custom entry types.

Steps to reproduce the reset issue:

1. Customize entry types, e.g. by adding new entry types and/or by removing and/or adding fields
2. Close/Start JabRef
3. Watch preferences in JabRef preferences -> custom entry types can be found there -> ok
4. Reset preferences
5. Close/Start JabRef
6. Watch preferences in JabRef preferences -> custom entry types can still be found there

Steps to reproduce the import issue:

1. Customize entry types, e.g. by adding new entry types and/or by removing and/or adding fields
2. Close/Start JabRef
3. Export preferences
4. Import preferences in JabRef installed on a different system (Win 7 as well in my case)
5. Watch preferences in JabRef preferences -> imported custom entry types can not be found