It allows converting retail backups to a format that allows DevMenu or BigBlueMenu to install them straight to the 3DS Dashboard/HomePage.
Change log (5.1.4b):
fixed rsf not created for option 1
added more try routines
attempting to fix issues by users
added: extra try for rsf creation
added routine to cycle through other makeroms provided, before closing.
added ctrtool from piratesephiroth for compatibility issues
added Vappy's latest rsfgen for new rsf capabilities
added piratesephiroth's updated exinjector
updated to new format where the question's are posed first.