Error retrieving information from user datastore (Devices)
This error occurs when the local datastore has become corrupted. To re-create the datastore, you should delete the datastore and reopen a solution by the following the steps.
This process deletes any custom items that you have added to your datastore, such as custom XML device definitions (usually copied from existing XML device definitions), emulator configuration properties, and so on.
To delete your datastore and reopen the solution
Save your work, and then close all remote tools and Visual Studio.
Delete all of the contents of the Corecon directory.
This directory is located under %LOCALAPPDATA%\Microsoft\CoreCon.
For example, del /s "%LOCALAPPDATA%\Application Data\Microsoft\Corecon\*.*"
Restart Visual Studio.
A new datastore has been created.