.dat files are the original file that I think is correct.
.dat.bak I believe are the back up files.
I had started a new project the other day.
My original .dat (scenario so I could get rid of that entrance and put a different one in).
I tried to use the .dat.bak file but it didn't work.
I have to start all over now on the project.
I was liking how was turning out. I have the .dat.bak saved on my flash drive.
So I'm hoping someone can help me resolve the issues.
Thanks in advance.

i think you need both files for it to work

If i remeber it right, than the bak file is the back-up copy of the safegame.
But the bak file works only, if you renamed it without the .bak at the end.

As an example:

Testpark.dat -> original file
Testpark.dat.bak -> back-up copy -> delete the .bak of it to become the original name -> Testpark.dat

If you lost your original file or the file is coruppted or whatever, rename the back-up file to the original one and it should work. But safe a copy of the back-up file to! Allways good to have back-up files.

I hope this is right, i dont try it out by myself, so if i talking bullshit, feel free to correct it.

Lg Cheleste

Thanks again for the tips. I lost all of the projects I made, so I will have to download them from this site.