(Installation|Configuration)
backup metadata such as connection, report, …
The best way is to search in the documentation of SQL Developer the section “Location of User-Related Information” in the concept chapter. This section gives you a detailed procedure on how to proceed in order to relocate the metadata directory of SQL Developer.
Example for the version 3, you have to set the environment variable IDE_USER_DIR. You can do it by creating a SQLDeveloper.bat file such as this one in the Sql Developer home directory
SET IDE_USER_DIR=C:\dropbox\Config\SqlDeveloper
sqldeveloper.exe
The conf file contains the Java Home option:
# SetJavaHome ../../jdk
SetJavaHome C:\Program Files\Java\jdk1.8.0_45\bin
The start configuration file of SQL Developer is :