It seems that the program file "MT-eXperience.exe" is missing after installation. You mentioned that you have already tried installing the newest version, running it as an administrator, and installing it on different drives. Since those attempts did not resolve the issue, you may want to consider contacting the support team or the developer of the "MegaTrainer eXperience" program for further assistance. They should be able to provide you with specific troubleshooting steps or a potential solution to fix the missing file problem.
