Installed a fresh version of SharePoint Designer 2013 on my desktop and when I tried opening a new site, it would crash.
Prior to installing SP2013 Designer, I had to de install a beta version. Apparently, the de install does not clean up registry
HOW TO FIX
HOW TO FIX
Go to Start > Search all program and files and type in ‘Regedit’
Navigate you way down the tree until you get to Open site for SharePoint 2010 (14 HIVE)
SharePoint Designer 2010 (14.0)
HKEY_CURRENT_USERSoftwareMicrosoftOffice14.0CommonOpen FindMicrosoft SharePoint DesignerSettingsOpen Site
Then navigate you way down to Open Site for SharePoint 2013 (15 HIVE)
SharePoint Designer 2013 (15.0)
HKEY_CURRENT_USERSoftwareMicrosoftOffice15.0CommonOpen FindMicrosoft SharePoint DesignerSettingsOpen Site
Compare your Client GUID values and make note if they are the same value. If so, Delete both of the ClientGUID keys. Highlight the key,
Right click and delete. After you delete each of these keys, you should be able to open site in both versions of SharePoint Designer.