Question 1: Is Extra! X-treme 9.1 (18.104.22.168) supported?
Question 2: Windows 10 Pro OS built 19041.264 compatible to Is Extra! X-treme 9.1 (22.214.171.124)?
According to the Product Support Lifecycle page, Extra! X-treme 9.1 was released in 2009 and is no longer supported and has not been tested (or supported) with any version of Windows 10. The current version of Extra! that supports Windows 10 is 9.5 and in the next couple weeks Extra! 9.6 will be released. If you are a maintained customer, you can download the current version of the product here.
If you need support for Extra! contact us.
It sounds like you have followed the process for the trial correctly. My best recommendation is to check your SPAM and junk folders/rules for the email. The email is from "Micro Focus" with the Subject of "Your Extra! X-treme trial download link." That email subject contains all kinds of keywords and punctuation marks that will likely set off any spam filter.