Output optimisation passes to excel file

I feel it would be useful to be able to store optimisation results, having them write to either an SQL or excel file as they are generated (so the parameters and trade statistics). On occasion calgo has crashed, loosing a range of results, but even without that, there's no way to store a range of optimisation runs, without manually copying each one down one by one. Once you run a new one with updated parameter ranges, all the previous ones are gone.