Apologizes, I can see that Claymore miner has this option but Phoenix Miner does not.
Anyway, Phoenix Miner supports only "Blake2s" as dual mining.
You can untick Blake2s algorithm from Algorithms in options.
That should do the trick.
I have no option with profit miner, which allows me not to take into account the dual mining, via phoenix miner, even if I disable blake 2s, if I enter 0h / s and 0w dual on ethereum, I will necessarily work on the ethereum, I had no problem with the previous version, while it is not necessarily the ether the most profitable consumption power
If you don't want dual mining, isn't your Profit Profile change where you define 0 H/s for Ethereum Dual Mining Hashrate working fine? In previous versions this change was not required for Phoenix Miner as dual mining wasn't supported.
if I enter 0h / s in the dual mining, yes I will not use it, but despite the 0h / s and 0watt dual, is taken into account in the calculation of profitability, so my rig no work more on the most profitable currency.