This tool should be used with care, it will delete the current show (but not the showfiles in MyDcoument) and all M-Series drivers from a system.
Before doing anything else, if you can start M-PC, save your current show to a file. the current show will be lost in the process.
1: Close M-PC if running, and reboot.
2: If M-PC is already installed, uninstall M-PC the regular way using the Windows Program/Feature
3: Download this cleaner tool
4: VERY IMPORTANT Right-click on the cleaner and run it as Administrator, otherwise it will not be able to perform its duty.
5: Select the three first options to clean M-PC
7: Install latest M-PC version from controllersupport.martin.com