The newer versions you can keep the app installed but it's safer (ha ha) to use the uninstall recovery feature inside safestrap if you need to flash anything. The FXZ and/or HoB will likely deal with it anyway but as a matter of best practice it's best to clean it up first.
Alright thanks I knew there was an issue with SS on earlier versions of the HoB that it had to be uninstalled. Better to be safe than sorry. Although there is a root exploit now it is not a 123 operation anymore.