For those seeing double, go int Options/preferences/gui and move the fixed sphere slider
(i notice a bug it does not refresh correctly when going back in the 2nd time but it should save properly)
Move the slider to the right and see if your double vision issue goes away.
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If the above fixes you edit the gui.cfg file in the settings folder.
right now the reader has a slight bug so it's one line off.
Change the 0,ForcedFixedSphere to the number that shows at the next line of x.xxxx,FixedSphereSize
It then should load correctly for you with out having to change it each session.
HiTech