Editing exported track

[jkyyt]

I was a bit too lazy to make enough backups and thought I wouldn't need to make multiple saves during adding objects to the track. Then an error occured as I was saving the file and then what happened is that every single piece of scenery and all the objects are now gone...
The previous save has just unfinished pieces of scenery and it would be a bit annoying to make all the work again as I was just about to finish the whole thing. That would take again hours and hours.
The thing is that a little bit earlier I exported the track to RBR and there it of course has all the objects and the finished landscaping. Is there a way to edit that exported track file so I would save all those hours rebuilding it from scratch again?