Up to you of course, but you might want to check that the top move button is making contact in the down position. The FTC module has nothing mechanical and does not look to have high load components that are likely to fail. Not saying it is impossible, but a mechanical item like a switch has a higher chance of failure to my mind (and would be a hell of a lot cheaper to replace). There are also lots of micro switches etc, but these should have shown issues on the dealers scan tool.
If you do need the module you might want to check local car breakers or ebay. Good luck with the fix.