Here’s an update to an earlier post of mine about the “Failed to load the workflow” error in SharePoint Designer. This time when the error popped up, I was working on my Vista laptop. In Vista, the user settings are in a different place, and I had a little trouble finding them.
Go to C:\users\[your_username]\appdata\roaming\microsoft\sharepoint designer\proxyassemblycache and delete all of the 12 folders (after closing SharePoint Designer). Who knew that I was roaming? I was sitting still at the time.