I recently purchased Cubase 12 pro. I installed it on 3 different computers and did the activation process. Then I had to format the 3rd computer. After formatting, I installed cubase 12 pro again and after a few days I encountered activation problem in VST instruments. Now my 3 license processes have been used. Is this why such a problem arose? Do I need to deactivate cubase before formatting the computer on which Cubase 12 Pro is installed?
yes. Using the Steinberg Activation Manager.