I'm not sure what the latest game version is. It has been awhile since any patches were released, though, so I'd think the main download should already be updated.
Did you contact Impulse about the error attempting to download the reported update?
There were improvements to the graphics and game engines in the remastered DKS release, and additional graphics options added compared to the original release of D2:ED. Also, DKS includes the add-on, Flames of Vengeance.
Check with Impulse and see if you can get a refund on D2:ED to apply to DKS.
Failing that, Steam offered DKS at a discount to people who purchased the original D2:ED through them, so you could check if Impulse does the same. With the add-on installed, there is a D2:ED+FoV to DKS conversion patch, though it would be easier and probably cheaper if you can exchange your D2:ED license for DKS.
Welcome to the forum.
