I've recently created a new plan for a larger venue using LXfree Java 1.0.5 however when I try to export the plan to a PDF file the option is greyed out on the Export menu.
Plans for smaller venues export fine though.
If I try loading the example plot from the Help menu, the Export PDF function works fine. However if I change the Scale to Metres the PDF export option is then greyed out so it looks like it could be a problem with the drawing measurement units (all my plans are in metres).