[Ifeffit] Troubles opening saved Artemis (Demeter package) project files.

Hi all, I'm new in the list and I didn't find any problem like this one in the Mail Archive. I have installed Demeter on Windows 7 (Ultimate version, SP1). Upon creating and saving a (new) Artemis project file I tried to open it both by double-clicking or by first launching Artemis and importing it from the "Open project data" option but the Artemis windows stick around a few seconds, and then disappear, along with the black DOS window. No notice of a crash appears; the program just fails to launch. This not only happens with this file but other files cannot be opened also after being saved. Any(s) suggestion(s)? Many thanks in advance. Raimundo