Can you start eDrawings from the eDrawings icon? If Yes try to drag and drop the file into eDrawings windows.
Can you try to open another file?
I want to recommend that you to reinstall your windows because sometime there are some confusion in the registry.
I know that is a huge work but may be resolve your issue.
Before do that try to open eDrawings and drag and drop same files to see what happen. If eDrawings can not to open all files I think it is better to reinstall your windows, but if eDrawings can not open only one file then the file is corrupted.
Has there been a registry key created for eDrawings?
If you are running any antivirus programs this can cause an issue. If so try turning them off to run the install.