Hey efg
If you take the X folder, which is located between the licensing folder and the x photoshop folder, from the large file download you can copy that into the wordpress themes folder within WAMP. The path would be:
C://wamp/www/wordpress/wp-content/themes
Once you’re inside that themes folder just paste the X folder. Reload your localhost in the browser and then return to Appearance > Themes and you’ll find X there. After that all you need to do is activate it.