The mixer tool bar won't let me select an input source

The little box that allows me to select an input source has gone gray and blank. I tried reinstalling but it didn’t work. Anyone know how to remedy this setting?

Usually that happens when you plug in a USB deck like the ION, Numark. The device takes control over the input and thus input selection is greyed out - recording should take place ok with the USB device in control.

If that’s not the case - you haven’t supplied any information about your h/w and connectivity environment and thus it’s hard for us to hep you.