Today, started aptana as usual and no more projects in "Project explorer" or "App explorer". If I try to re-add them (import, add project to workspace, etc.), I can't (msg : Some projects cannot be imported because they already exist in the workspace). If I add a new project, it appears correctly each time I launch Aptana. But not my older ones. In the project menu, "Open project" and "Close project" are greyed.
In "Project Explorer", "Top Level Elements" is set to projects. No working set activated neither. On another workspace, everything is ok. I tried to change my java version (tried Openjdk 6 and 7 and Java 7) (just in case...). Tried to reboot (just in case...)