Quartus SE closes when opening a project designed with Web Edition

[Altera_Forum]

Hi everyone,  

 I have problem with Quartus II Subscription edition V.12. In the past I used the Web Edition V.11 to develop systems on a Cyclon III FPGA. Now I want to use the Subscription Edition to open these projects. When I first tried to open the project I hadnt installed the Cyclone Device Support, but I was able to open the project. Since I installed the Cyclone Device Support, everytime I try to open an old project, Qartus immediately closes without an error message! Did anoyone else encounter this problem and has solution?   Thank you very much   Felix

[Altera_Forum]

Did you try after deleting the db directories, or with an archived project?

[Altera_Forum]

I just copy the old project to a new location and opende the project-file. Is that the problem?

[Altera_Forum]

I tried it again after deleting the db folder, but the same keeps happening!