If you need to transfer your Feedreader data files to new computer or just backup files for storage then it's easily possible.
Feedreader stores all the data in one file. It's named rssengine.fdb.
rssengine.fdb can be found in two locations (it depends on choosed installation method):
If you also want to backup feedreader program settings (proxies, localization, ...) then please backup feedreader.ini what is located in following locations: