Thanks for your reply. tickstory, but that’s definitely not the case that I am running Metatrader in the background. Even after a reboot the first thing I tried to do is to edit the FXT file (without starting MT4) and then it’s already locked. Sometimes, I am able to edit a file and save it, like this morning but the second file I tried to save is already giving the error message.
I have tried to install WhoLockMe but that was not working on my pc (Vista 64 bit), so I installed another application called IObit Unlocker and this is showing me that the FXT file is not locked, which is in line with my previous comment that I am still able to change i.e.the filename in Windows Explorer while Tickstory FXT Editor is telling me that the file is locked. It looks like Tickstory is locking the file by itself.
