Uninstall & Reinstall QCS
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1. Search for Add or remove programs in system settings.
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2. Search for QCS in Add or remove programs.
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3. Click on QCS.
4. Click Uninstall & uninstall the older version. (Remove the application from this computer.)
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5. Click the link below for a fresh QCS install.
https://www.qfgi.com/QCS%20Programs/QCSv2/publish.htm
6. Click Install, once installed your done. Always install updates whenever they are offered.