I add several videos to TVAI by drag & drop.
They appear in the sources area and I select them all.
I select a preset and try to start the batch by clicking on the export symbol.
Nothing happens.
I have to select all sources again and only now I can start the batch export.
SOLVED
I’ve just had the same problem. I selected multiple sources, the Export tab was greyed out and a message that I could not “Save as” with multiple exports. I right clicked on one of the selected sources and there was an option to export but clicking on this achieved nothing, However, clicking Ctrl+E manually did the trick and all 42 are now being processed.