EQ wont start - DSETUP.dll is missing

[Dakliq3]

Two days ago I had mentioned (with few details) that EQ is not launching for me.

Background - I played EQ for a few years and always launched it through EQEmu. Eventually, I followed a process that let me just open into P99 by opening my eqgame.exe file which worked fine. I do not remember deleting any game files during a PC "cleansing rage" at any point, but that does not mean it is outside the realm of possibilities!

Symptom - When I double click eqgame.exe I get the following:

eqgame.exe - System Error
The program can't start because DSETUP.dll is missing from your computer. Try reinstalling the program to fix this problem.

Is this salvageable? Do I just need to update the code? Or, do I need to delete it all and try to figure out how to get it on my PC again. Many thanks in advance.