No need for help anymore as I have found the solution on this forum after some better searching and that works fine for me. The solution is :
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The drag and drop is available by clicking, and holding down, on the up or down buttons for a second, you can then drag the block around.
Although this isn’t very obvious, it’s an interface that is being iterated on, and will hopefully be more intuitive with the next update, until then we can only apologize for the confusion.
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Thanks, Walter