I, too, am sorry to Necrobump but I'm having quite a bit of trouble here. It seems as though MGE has overruled my Morrowind and won't let it work anymore.
It's been ages since I started Morrowind, only did it to see how it would run, but couldn't run any MWE mods because the game would refuse to load via MWE due to me playing on Vista. Since then I've swapped to W7 64bit.
I don't plan to use the 'main' parts of MGE (the graphics, old laptop, you see), but I decided to install it so that I could run the Script Extender, MW Enhanced, and the FPS Optimiser all in conjunction (MWSE runs as a part of MGE, from which I would boot MWE, which launches Morrowind).
Prior to this, I was able to get Morrowind to start through its own launcher, through MWSE, and through MW enhanced (good, it couldn't do that on Vista).
So, I downloaded MGE and tried to install. I received an error, something about not finding 'dxd3_30.dll' (I BELIEVE that was the dll in question), so I put the install on hold and downloaded a DX9 package from after August of the specified year (the one I got was from 2K10, which is well up to date compared to what MGE asked for) and put the relevant dll in my System32 folder.
So, I tried the MGE installer as per normal. Again, same problem, so I just thought I wouldn't bother and would find an alternative at a later date when I needed MWSE (probably won't need it for my first play).
So, just to confirm all over again, I tried to launch MW Enhanced. It failed to bring up the normal grey GUI boxes, said it had an issue with MGE - again, a dll one, however I believe this error message was SOMEWHAT different. So, I downloaded a registry / dll cleanup tool, ran it.
Now I launched the MWE GUI again, yup, got the options this time, clicked 'Launch Morrowind' and got the Morrowind Launcher (Play, Options, Data Files, etc.). I clicked Play and got a little box up in the corner as it always does just before MW goes fullscreen, then got this error message:
Could not open MGE\dinput.data for reading.
You need to run megui.exe at least once to create the save files
I click okay and I'm back to no Morrowind. I even try running it with MWSE and with just the launcher itself. Still no luck, same issue as above
When I try to run mgegui.exe, I get a 'MGEgui.exe has stopped working' message, and nothing happens. So I figure I have to install MGE then. I run the installer despite the problems, same problem with MGEgui.exe after install, same problem with the Morrowind launch.
By now I just decided to uninstall MGE entirely so I can just run Morrowind outside of MGE, so I uninstall it.
I still get that same error.
I no longer care about the benefits of MGE, I'll sort those at a later date if I wish so. All I want to do now is to play Morrowind. I fear an uninstall and reinstall won't solve it - this isn't Morrowind's fault but MGE's, as MGE is always automatically 'attaching' itself to Morrowind. Morrowind won't run independently, it's always trying to run VIA MGE.
How can I de-couple them from one another? As though I never downloaded MGE at all?