Reinstalling Panorama 6 is easy, so you might just want to try it. I doubt if it will have any effect though.
You mention font size specifically. Does the layout otherwise appear correct? What if you put a simple shape on the data tile (a circle or box). Does that print in the correct dimensions? If not, then you have a general print scaling problem. If the shape does print correctly, then the problem has something to do with fonts. Perhaps the font is corrupted? You could try a different font. I’ve never heard of a problem like this, at least as I understand your description.