OPOS Installation

If you install the RPSW and install OPOS 2.2, then you are installing an older release version of OPOS over it; the install lets you install because the “product name” has changed from OPOS to Retail Platform Software for Windows, and the old installation cannot detect the newer release. The real problem comes if you then try to upgrade that older version you just installed back to the newer version. The install thinks the newer version is already there and does not upgrade. If you get into this situation, uninstall both the older and the newer releases of OPOS, and then reinstall.