Unfortunately it is not possible to upgrade from oRTIgo 1.X to oRTIgo 3.0B directly, without upgrading your firmware version 4.X of your PMX-III. Please contact your local distributor or contact RTI directly for instructions how to upgrade your PMX-III firmware to the latest version.
After that you have received the latest firmware for your PMX-III you can use the oRTIgo 2.X to 3.0B upgrade (Windows/Dos) here on the homepage to upgrade your oRTIgo 1.0 software.
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