NOTE: Technical Support is ONLY available Monday - Friday (9 am to 5 pm), it can take a few days to get a response depending on the level of demand. Thank you for your patience.
The diagnostic tool is provided for troubleshooting issues with FL Studio as well as creating diagnostic reports for Technical Support related issues.
Windows - Open FL Studio > Help (menu) > Diagnostics. If FL Studio won't start it's in C:\Program Files (x86)\Image-Line\FL Studio N\System\Tools\Diagnostics (N = version)