InDesign stopped working yesterday and wouldn't load. I couldn't resolve the issue, so I ended up doing a resetting my Dell XPS 15 and removed all my apps (I got the computer back in December, so this felt like the best option since everything was already on my external hardrive). I kept all my personal files, but had to reinstall my adobe products. Everything appeared to finally be working again, but now the extension option under windows is missing. I found one forum where this issue was discussed, but no solution was proposed except to uninstall and reinstall. I did this and still no luck.