regarding "Inkscape 0.92 can't open or save .plt files"
https://bugs.launchpad.net/inkscape/+bug/1658260

Just got word from SK1 devs that an update is issued:
"Inkscape to Uniconvertor: .plt file output scale discrepancy - UC/Sk1 still inputs at 90dpi?"
https://github.com/sk1project/sk1-wx/issues/44#issuecomment-457963940  


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"@8thrule @raboof we have added optional parameter for svg processing: --svg_dpi Default value is 90, but you can use 96 to resolve issue.

uniconvertor file.svg file.plt --svg_dpi=96
Hope this fix the issue. You may test changes using uniconvertor night builds:"


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TD