This quick tutorial will cover how to clear your SPD 2013 Cache, which comes in handy especially when working with SPD 2010 & SPD 2013. Clearing the cache will remove any of your past connection history as well give you a “clean slate” to work from. The cache is not even cleared after doing a reinstall, so this really is the only way to clear it.
1. Close SPD if it is open
2. Open My Computer
a. Click the address bar
3. Paste %USERPROFILE%\AppData\Local\Microsoft\WebsiteCache
4. Delete everything within this location
5. Click the address bar
6. Paste %APPDATA%\Microsoft\Web Server Extensions\Cache
7. Delete everything in this location
This is a quick couple of steps in order to clear your cache and to hopefully resolve SharePoint Designer anomalies which present themselves from time to time.