Hi Dafydd,
Yes sorry this thread doesn't belong here, I already moved it to the previous version of PD thread.
Long story short, when I bought it, I activated and registered with cyberlink and it used to work fine on my PC. Then at some point a few months ago, I decided to re-install Win7 and then after that no matter what I did, it never opened MTS files. Now even after upgrade to Win10, it doesn't open MTS files, but works fine with mpeg.
When I contacted the support, they created a ticket number and asked me to provide a bunch of information. I collected everything they needed and put the requested info in a folder under the same ticket number in their file server. I checked the status now and it shows closed. So nobody really bothered to follow up and resolve the issue. To get phone support, I have to pay more money. Ridiculous. Anyway, I lost money buying this product, and am not about to spend more money. I'll stick with something simple like Windows Movie Maker, which is free and okay to serve my needs. I am sure PD itself is great when it works but when faced with a simple file format issue, I haven't gotten the support to resolve my issue. Oh well...I'm glad I didn't pay hundreds, it was 60-70 bucks I think.