... -installed via an IE11 browser window instead of Chrome. Worked fine except no tick-box relating to file associations. went to download directory where the sk5 files were hiding- double clicked one- it opened a Chrome window (my browser default) and ran fine.... please explain Hi Mike, Explain? I can't even follow or understand what you are saying, let alone explain it. I am prepared to swear on the Peco catalogue that you did in fact see the file associations tickbox, see: 2_102013_400000000.png Do not untick it, or lots of things won't work in Templot. There is no way that opening an SK5 file can open the Chrome browser unless you yourself have changed the program associated with it in the Windows registry. Opening an SK5 file will do one of these things: 1. the Templot video loader will run. If the relevant FBR video file has not previously been downloaded you will see a progress bar while it is downloaded. If it has been previously downloaded, the loader will go straight to: ...