Can you introduce filelocking?
This is a much used and request feature with us.
Let us know.
File locking and notification is in the development backlog and is expected to be available in Q1 2016.
I have had a discussion with our product owner, and it will be released within Q3.
I can't say a specific date yet, but it will be put in our next sprint so we will start working on it.
This is a part of our release end March 2017 - the functionality is for a start a manual file lock (right click on the file and select Lock)