Hey there! The 1.4 version from Steam has no significant changes, only the Speedrunner protection (a small random number at the top) and the ability to skip the final intro. That's why we did not update it here in Itch.
If you like, we can give you a Steam key so you can also check the update there! Just leave your e-mail and we'll send you the key ^^
Thanks for being such an active player!