I received the following message from Tech-Support today (since it might be interesting for others as well I'm posting it here):
EU is not available in Impulse yet, plans are in the making for it to be so, but not at this time.
There is nothing to update as EU is the same versions as our current Dark Avatar & Twilight.
My "Endless Universe"-versions are:
If these are the newest versions (?)
everything is fine (leaving aside EU-users cannot use the beta-updates - which is possible to other customers if I understand that correctly). I am mainly interested in the forthcoming V.2.0 so I hope SD is not just building castles in the air ...
Anyway, thx for clearing it up.