Will mBlock 5 replace mBlock 3 that I previously installed? Eleven Wang August 30, 2018 09:25 Updated No, it won’t. Both of them will be stored in the computer. You can use mBlock 3 and mBlock 5 at the same time. Related articles What is the difference between upgrade firmware and reset default program If you cannot detect any serial port when connect to mBlock 3.4.X, it may be caused by the following reasons. Programming mBot Ranger with mBlock 5 About mBot Controlling Ultimate 2.0 with the Makeblock App Comments 0 comments Please sign in to leave a comment.