There is some error in the customize entry type in Jabref 2.10. This was not in previous version. The problem is that it is not saving the customize entry type once it is set.
e.g. suppose for the entry type "article", I change "journal" to be below "year" and use apply. For this window only, it changes, but if I restart the program again, it is going to the older configuration i.e. "journal" then "year" not that what I set last run. previous upto 2.9, this feature was there. It is the problem for newer version.
Duplicate of #1141?