Thanks for your answer Gruß
I guess I managed to try your suggestion. I created a new project in AllPlan, but it was not clear for me where was it saved. I think the right path was
I pasted the files there and restarted allplan. When AllPlan was starting up, I received a window with the following error:
"Los datos proceden de la versión 2003/17, y no pueden ser editados con esta versión", which says that "data comes from 2003/17 version and cannot be edited with current version". After hiting ok, AllPlan closes
Do you think that I can try anything else to be able to see/edit the project?