If the file is still on the same Computer but in a different location:
1) Go to the Window icon in the bottom of your computer. Type in: %appdata%/Viewpost (you won't be able to use the sync agent to get there because you need to log in first)
2) Select Viewpost>Config folder
3) Right-click "VpSyncUserSettings" and select "Edit"
4) Near the top, there will be this block of text. Delete it.
<LastRestoreTime i:nil="true" />
<Location>C:\Users\Public\Documents\Intuit\QuickBooks\Company Files\QB Testing R108.qbw</Location>
5) Save. Next time you open the Sync agent it will allow you to select the new location.
Just download the agent as if you never had it.
Please give us a call if you would like us to walk you through the process.