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copy your backup file to some where else safe in case something goes wrong.
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Uninstall manager (so you can install an older version)
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Install the version of Manager you had before (I save a backup with the version number appended to the file name prior to updating Manager). You may have to guess when you last updated Manager / which version you were using. Old software can be downloaded from links shown in this post Restoring data issue - #2 by Patch
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Import the backup of your business file and use that to print old records