Sorry about the necro, but this was brought up in My Darktable Customization - #18 by Roland_Rainer.
I’ve exported all my presets on Ubuntu, current master, imported them into Windows 4.9.0+419~g9ba5a0641c (a few weeks old). The were imported OK. I only have two auto-applied presets, (turning on lens correction and setting color calibration to as shot in camera), and those are applied to all raw images, so there is no filter on ISO or any other params. They both work on the Windows machine.
ps. I was also able to simply copy over my shortcutsrc. I then tested a single-key shortcut as well as complex ones (Ctrl+Alt+F+scroll, Shift+Alt+F+scroll - which I used to adjust filmic rgb contrast in shadows / highlights settings), and everything worked on Windows the same way as it does on Linux. This is with Hungarian keyboard layout on both systems.