How do I check what versions of hardware, firmware, and software I'm using in Maestro 2?

Open Apogee Maestro 2 and click on the "Apogee Maestro 2" menu in the upper left-hand corner of the desktop menu bar

Select "About Maestro 2". This will bring up a window showing you all the current versions of everything.

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In some cases (multiple Symphony I/O's, for example) you may need to use the mouse to scroll down through the versions to see them all.