x5 uses standard coding for there websites, so if this new edge can handle that then yes.

The question should be the other way around.
I hope this new edge is better because so far internet explorer has always been better then edge although they stoped devoloping IE for years now. Edge has or maybe hat a lot of bugs so a new one is a smart choice from microsoft.

So install and try! 

And if it still fails, step back to firefox or chrome or another browser.....

Edge für Win 7 installiert und läuft. 

Here is what Microsoft has to say about it:

I have installed it on Windows 10 and it seems to be OK!