I just installed the 4.0.3 version of SQLD. 2 remarks/bugs concerning SVN:
When taken over the preferences of the previous version, it doesn't take over the SVN connections, so I have to recreate the connections again.
When trying to update the config file of SVN, using the 'Edit server' button (Preferences>Versioning>Subversion>General), a window pops up with the message : Failed to find Subversion configuration file "servers", please locate file manually. In the 4.0.2 version, the file is located in: ...\AppData\Roaming\SQL Developer\system220.127.116.11.21\o.jdeveloper.subversion.18.104.22.168.41.140418.1111, for the 4.0.3 version the directory does not contain the file anymore.
In addition, the disabled features of 4.0.2 are enabled again in 4.0.3
Addition: after disabling the features, and restart, the connections and config file are present!