... change the algorithm after setting the keylength. It has to be restarted for further use.
Because there are no start scripts, yet, you have to start Fileprivacy from console by typing:
java -jar Fileprivacy-1.0_<version>.jar
####### ALSO NOTE #######
The author of this software is not responsible for the safety of your data. There is no guarantee that one or more of the implemented algorithms cannot be compromised.