For me Ultra Fractal is my main tool, but sometimes, when my inspiration in UF is over, I change to Fractal Explorer for some time.  It works refreshing and after some time my feelings for UF are back again.  The further development  of FE has been stopped, that's a very pity.  I know there are so many possibilities but there also wishes (e.g. easier rotation, application of layers).  I don't know if the FE-code is free now, according to the FE site we have to pay a lot of money for it.  This, together with the rights, prevents further development by others.  One of my question marks is: what can be the reason that the results when using the same formulas (e.g. Talis var.1) are so different in FE and UF?  I'm not the only one who wonders, Toby Marshall also does.