It seems like some of your settings got messed up during the update. Did you make a custom screen layout for DKJC?
Can you try if you get video back by trying another screen layout, or resetting the current one to default?
DraStic has a warning popup if the device is running low on RAM and that it might close unexpectedly. I thought it could have been that.. If Android decides to close it immediately, you probably wouldn't be able to read taht anymore.
If those 3 files are copied there when you start, then DraStic can find and access the directory. If you then create a subfolder 'system' and place them in there with the correct name, it should find it. If not, it might not be the correct files.