Redmine

Hi,
At work we are researching whether or not moving to Flyspray would be a viable option, however because of how long ago support faded there is little to no documentation on how to migrate from them, though I may have totally missed it and known.

Does anyone know how I would go about doing that, or know where I can read up on it? Thanks before hand!

This is the details asked for atm:

Environment:
Redmine version 2.4.2.stable
Ruby version 2.1.0-p0 (2013-12-25) [x86_64-linux]
Rails version 3.2.16
Environment production
Database adapter Mysql2
SCM:
Subversion 1.7.14
Git 1.8.3.1
Filesystem
Redmine plugins:
leave_management_system 0.0.1
redmine_announcements 1.0
redmine_apijs 4.2.0
redmine_custom_css 0.1.1