What error does it report and when - before start, during installation, when you try and open a project?
If you have uninstalled it and then tried to reinstall it and then found a problem then it might have a corrupted asset that was left behind - some files like your projects are left behind to give you continuity of experience when you uninstall it. After uninstall, did you delete some remaining files using explorer? Try installing it again and then use http://www.revouninstaller.com/revo_uninstaller_free_download.html free version to run the uninstall - but back up the project files! I would start with the normal setting and select delete everything left behind. It should allow you to do a completely clean install.
If these don't work you could try posting a problem herehttps://forums.html5dev-software.intel.com/viewforum.php?f=29. I can't think of any more to suggest you try... i hope something here works!