Hi Sphin,
So finally found some time to do some debugging.
Issues are due do the Kraken naming conventions for pairs.
So to let it work with fiat please do:

in Zorro.ini (note the ZEUR and XETH changes):
DisplayCurrency="ZEUR"
BaseTradeCurrency="ZEUR"
IntervalSec = "30"
DemoTrading="1"
EnableLog="1"
UseCryptoCompareHistory="1"
MinOrderSize={"error":[],"result":{"REP":0.3,"XBT":0.002,"DASH":0.03,"XDG":3000,"EOS":3,"ETH":0.02,"ETC":0.3,"GNO":0.03,"ICN":2,"LTC":0.1,"MLN":0.1,"XMR":0.1,"XRP":30,"XLM":300,"ZEC":0.03,"BCH":0.002,"XETH":0.02}}

and in your asset list(notice the last column):
BCH/EUR,50,0,0,0,0.00000001,0.01,0,1,1,0,BCH/ZEUR
ETC/EUR,50,0,0,0,0.00000001,0.01,0,1,1,0,XETC/ZEUR
ETH/EUR,50,0,0,0,0.00000001,0.01,0,1,1,0,XETH/ZEUR

Not sure how your BCHEUR has been working with your current setting as is't not working for me with my settings.

To know the naming conventions for their pairs please cann this API from the browser:
https://api.kraken.com/0/public/AssetPairs

Cheers