Replaced an asset and now project won't open

Question

I was finishing up some subtitles when I noticed an audio problem that needed to be corrected.
So I saved my DVDSP4 project, quit the program, then made a quick audio cut in FCP. The amount of audio cut was less than a second. And because I cut my audio, I had to make a cut in my video.
Then I exported using Compressor (DVD Best Quality - 90 mins). I saved over the original asset, figuring I could save some time and have DVDSP automatically update the altered asset.
That was my mistake. I've spent the better part of two days adding subtitles to this project, and now the frigging thing won't open.
When I opened the DVDSP project file, all my windows are missing excpect for the Palette and Inspector windows. The majority of menu options from the menu bar couldn't be accessed.
However, when I open DVDSP from my dock, it opens up, all the windows are there, and the menu bar is fully functional. When I try to open the project file I've been working on using File>Open and File>Open Recent, I lose my windows and functionality.
Any suggestions as to correct the problem?
Quad G5, Coded Named: Mistress   Mac OS X (10.4.5)  

Answer 1

If Houghts' suggestion doesn't clear the problem initially, you could try going back a stage (in FCP).
First make a copy of your new .m2v & sound files with a different name, and also the DVD SP project.
Next open the edited film in FCP. Assuming you have the sequence for the previous edit, redo the playout with the same settings and name you that had originally, and without the one second cut. Overwrite the originally named files with these. Exit FCP. Delete all the PAR files and prefs for DVD SP again, as per Houghts above.
Now try opening your project - since the assets referred to are the same length as before, there's a chance that DVD SP won't get confused, and will re-link to them.
If it opens, you are back on track and can import the new versions, replace, then delete, as per Houghts above.