Lines don't show till once I finish drawing them?

I recently downloaded the PLE version of Toon Boom Animate Pro and everything seems to work perfectly but for some reason when I draw a line of just about any variety it won’t actually show any part of said line until I release the cursor. I’m assuming this isn’t normal as in any of the tutorials I have watched today the line has appeared whilst it was still being drawn.
If anyone could explain how to get the brush/pencil etc. to show the line as it is being drawn then I would really appreciate it.

What graphics card are you using? Have you updated to the latest drivers for your operating system? What’s your operating system?

This sounds like a driver-related issue.