Hi, I’m a colleague, I would like to help you, I hope that the folder is still in the trash, so you have to open the trash and restore it, just click on the right mouse button there is an indication what to do.
If, however, you have completely deleted the D5 folder of your work, as the program has suggested you must Save it with a name in the position it was there before, I hope you can do it.
Good work
Sorry for the English