Marco,
Sorry that you are seeing this issue. Thank you for sharing the log file.
It looks like one of the workspaces previously used by Eclipse has bad file references.
Can you please remove this file EclipseIDE/configuration/.settings/org.eclipse.ui.ide.prefs
and check if it helps fix the issue? It will make it forget all your previously used workspaces, so next time you launch you will have to manually select your workspace.
Please let us know how this works for you.
–Swapna
Genuitec Support