Inkscape 0.91 will be released soon ("weeks to months"), and we would like to be ready. The current installer is not compatible with Inkscape 0.91.

Todo:

• Check compatibility of Inkscape extensions with 0.91
• Update installers with new file locations for 0.91.
• Only install Hershey Text if Inkscape version is < 0.91.

For MacOS, the location of extensions in Inkscape 0.48.5 is:
/Applications/Inkscape.app/Contents/Resources/extensions/

However, in 0.91 the new location is:
/Applications/Inkscape.app/Contents/Resources/share/inkscape/extensions