Microsoft provides certain resources through its web browsers that developers use to develop software. So for ASUS to have web enabled components within Armoury Crate it would use the Microsoft provided resources rather than including a whole web browser within the Armoury Crate software. I don't know exactly why a beta was used at one time but it's likely because something ASUS needed wasn't included in the regular version.
But again, this was years ago. I have Armoury Crate and I do not have a file named MicrosoftEdgeBetaEnterpriseX64.msi on my system, I just double checked. So if you still have it from an old install and you want to get rid of it, do what the MS helper said and right-click>uninstall.
A bus station is where a bus stops. A train station is where a train stops. On my desk, I have a work station…