I confirm also this bug in Win 10, Inkscape 0.91 r13725 64-bit.
It's the main application that opens always off screen for me (haven't had probs with dialogs), and I think I know more about "where" based on how I get the windows back. Here's a screen shot of my monitors config in Windows 10: http://imgur.com/i9E1wj8 -- the "monitor" on the right is actually my surface Pro (smaller physically, but much more resolution, so it appears bigger in the monitors configuration - Win 10 is not smart enough to figure that out).
When I use the Alt-Space menu to get the window back "on screen" I select the Move command (as opposed to the Maximize command which instantly maximizes and is a good workaround). However, by using Move, I get some hints as to where the window actually is located. After selecting Move, the mouse cursor automatically moves to the upper left part of the left-most monitor (not quite the corner, about 1/4 of the way from the left, depending on the width of the Inkscape window's width I think). Then I press the down arrow repeatedly until I see the window come back down on to the screen. It sometimes takes many presses.
So, it's my suspicion that windows are opening in a dead-zone that I indicated in red in the photo above.
Hope this helps! This bug has been active for going on 6 years??? Cheers!
I confirm also this bug in Win 10, Inkscape 0.91 r13725 64-bit.
It's the main application that opens always off screen for me (haven't had probs with dialogs), and I think I know more about "where" based on how I get the windows back. Here's a screen shot of my monitors config in Windows 10: http:// imgur.com/ i9E1wj8 -- the "monitor" on the right is actually my surface Pro (smaller physically, but much more resolution, so it appears bigger in the monitors configuration - Win 10 is not smart enough to figure that out).
When I use the Alt-Space menu to get the window back "on screen" I select the Move command (as opposed to the Maximize command which instantly maximizes and is a good workaround). However, by using Move, I get some hints as to where the window actually is located. After selecting Move, the mouse cursor automatically moves to the upper left part of the left-most monitor (not quite the corner, about 1/4 of the way from the left, depending on the width of the Inkscape window's width I think). Then I press the down arrow repeatedly until I see the window come back down on to the screen. It sometimes takes many presses.
So, it's my suspicion that windows are opening in a dead-zone that I indicated in red in the photo above.
Hope this helps! This bug has been active for going on 6 years??? Cheers!