3.7.x does work rather well with default settings with certain currency pairs. Not good, mind you, but ok. 3.9.6(which has bugs fixed and has more features) does not work well with default settings.
It's not about which version is better. Not at all. It's ALL about SETTINGS. This EA lives by the SET FILES!
Blessing 3 is probably the most feature rich and customizable EA there is for free. There are tons of adjustable parameters. But it most certainly is not a 'drag-n-drop' EA! You HAVE to adjust it's settings for it be profitable!
There are so many parameters to adjust that optimizing is a pain in the ***. You can concentrate on a few important adjustments but it still takes a long time. It can take weeks or even months on one computer to create one profitable set file.
Please, read this post carefully and with thought and try to understand the core of this message. It is tiring to explain the same things over and over again.
Less effort, better results.