'Won't start at all' meaning the trainer doesn't appear in the Task Manager at all and/or you don't see the initial loading screen where it says Customized for ...? - What Windows OS and security software do you use? Have you created the suggested scan exclusions in your security software as described in the trainer's instructions?
Just downloaded and launched it here and it works as intended.
May need to do a memory/data/trainer refresh. Start with this first,
Delete trainer and all files in
Reboot PC to clear excess memory, get a fresh copy of latest trainer and
make sure trainer in is folder excluded from virus scans. Empty quarantine folder if needed.
may need to be added to exclusions as well. Run trainer as admin and try again.
Anti-virus help page. Link
Had the same issue, followed this, works perfectly now.