https://www.youtube.com/watch?v=bkqztQsoMNU&t=54s
Kenny just posted a new video on finding the song tempo.
At 5:37 after placing the tempo marker and holding down Control you should be able to the move the tempo marker with the ruler to change tempo.
The ruler is moving but not the tempo marker when I do it.
Using Win 8.1 - 64 bit
Can you give it a try.
I tried many many times with the same results.
I can't get to work as shown in the video.
Thanks
Eric