>does 0.05 BTC include bot and exchange?
No - but AFAIK - 0.05 is for the engine, "the core", then you pay 0.05 per exchange, meaning 0.1 for a full bot on 1 market place.
On the other hand, as BTC drops down, and Gunthar didn't bother to sell at USD price equivalent, for example, now the licence is FAR cheaper than a few days ago... ;-)
>Is it a free upgrade for the owners of a legacy license?
Yes, AFAIK.
Simply donwload it and see?