http://www.syndie.i2p/manual.html
The optional data_root parameter tells Syndie where to locate the
database, archive, and related data files. If not specified, it uses $HOME/.syndie/ (or %HOME%\.syndie on windows). When the interface starts up, the data_root/scripts/startup script is run, and when any nym logs in, the data_root/scripts/login script is run, if they exist.