Symptoms
Workflow that was designed in K2 for VS years ago but we lost the deployment source (.kprx) file. Is there a way to retrieve a copy of the workflow definition file?
Diagnoses
NA
Resolution
In the K2 Workspace management under "workflow server" > "Processes" . Expand this process then go to "Versions" and click on the download link to download an exe file that contains the process.
One other possible approach if you have a DB Backup of the older version of K2 is mentioned here http://help.k2.com/kb001356#Scenario1.