I know I´m like VERY late for this one, but just reading through existing forum posts didnt solve my problems, so I´ll ask directly:
After changing the drive letter of the hard drive i had diablo 2 + D2SE installed to, i had the problem, that none of the mods would start from D2SE.
Being annoyed by that i completely uninstalled everything and reinstalled D2 from the blizzard website (i have the online key).
Then I went ahead and followed the 10-step-installation guide for D2SE and noticed that the D2SE shortcut no longer had the correct icon and instead had the empty sheet of paper, you can see when the correct icon is missing. Then I did the whole compatibility thing only to run into the error, that some files are corrupt. (see this post, the full error message is there: https://forum.median-xl.com/viewtopic.php?p=81213
). After some more research i found out that i had to downgrade to 1.13c. So I followed the instructions shown here, only to run into the same issue as before. Reading through this thread ended up, confusing me even more than before, because now im not sure if D2SE can work with the blizz installed version at all, or if something has gone wrong while downgrading (which i highly doubt).
But prior to all that I ran D2SE from a blizzard.net installation which worked perfectly fine.
Maybe someone could guide me through what I actually need to do, to get D2SE going (i also refrained from downloading these 1.12 versions, that have been talked about in this thread).
To sum up:
I downloaded/installed D2 from blizzard.
Downgraded it to 1.13(not sure if c, i booted up vanilla d2 to check the version. It said 1.13)
Tried to install D2SE, failed