I don’t think that we will change the ini file format in the future. We will keep these upward compatible. What concerns the optimization errors, please send me your QuantTrader.ini file. Perhaps it has something to do with the Yahoo finance ASX symbol data. We already had some ETFs with missing data.
Once I have the QuantTrader.ini file we can see instantly what causes this error and we can also fix errors in the ini file, so that you can continue your work.
Please send the ini file to my email firstname.lastname@example.org
It seem strange to me that downloading Yahoo data is so slow for you. Perhaps try only to download data of the last close and not the 15min delayed prices available when the market is open. This one takes much longer to download.