Need to alter ea with addional settings and work on the mt4 600 live

I want to add a bonus trade to this ea. How this ea works is it does buys or sells and increases the amount of trade until it closes all trades when in profit. The bonus trade has a true or false and what it does is affects the 1st trade only. When you start at .1 and normally the next trade will increase to .2 and then .4 .8 and so on but the bonus trade does .1 next trade .1 again then it goes to .2 .4 .8 etc. I bought this ea on ebay and it works on demo account when I go live it just opens a trade then closes 10 seconds later I contacted the creater and because I didn't buy it from them there not honoring the purchase and giving me the updated version to work on mt4 600. I don't know if I have to build a whole new robot to make it legal if that's the case let me know with prices at least look at the robot I bought so you know what I'm after.