I finished everything up until the current version and it seems that I've lost one of the broken keys. I've looked at all the places the last 3 were supposed to be and they are all gone. However, I only have 3 broken keys in my inventory. Not really sure what happened to the 4th one.
Edit: I've gone through all the locations from the walkthroughs that is suppose to have the broken keys placed and I did not find any in those locations. So, it seems that either the game has broken in not placing one of the broken keys or my inventory is broken and lost one of the broken keys.
Is there any way of adding the one key to my inventory so I can complete this version?