Here are the steps to upgrade your existing plugin:
- Ensure you have the latest plugin - Available for download here 
- Go to System >> Plugin Manager 
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Select "Sophos Central" plugin  
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Click on Advanced >> Manage Plugins >> Update Plugin (Note: this will take a few minutes to complete, and a message "Database Agent Restarted Successfully" will appear before you can proceed. 
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This will open the file selection dialog. Please select the new plugin "Sophos Central.dll" 
- 
Wait for the update to complete 
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Click on Advanced >> Reload Plugins >> Reload DBAgent Plugins  
 
				