Backup / Restore to Windows PC

Restore Deletes Data & Causes Can't Save
I am using 1Password Pro V3.5.1 on an iPhone with the 4.0 OS. I have attempted to Backup my data to my PC via WiFi as instructed in the Help section. It appears to have backed up successfully but when I perform a restore the data is missing and when I try to save new data Entries I get an error on the iPhone that states "Cannot save changes...Failed to save <Type of data> : file is encrypted or is not a database". The only way to be able to save new data is to perform a database Reset and Destroy all current data. Any suggestions would be helpful.
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