When you download a trial, you can license it automatically from within the Desktop Licensing Assistant, which will allow you to trial FME for 7 days. You'll also get an email where you can confirm your email address to extend the trial to 30 days. You shouldn't need a serial number unless you are trying to license a trial offline. See FME Desktop Free Trial - FAQ for more info.

If you don't find the confirmation email within a few minutes, try checking your spam folder, as sometimes our automated emails will get filtered. If the spam folder doesn't have this email, contact us at fmetrial@safe.com.

You could also contact the nearest Safe software partner they would be happy to help if you still can't find it and you are in a different time zone .