Huh ???
Well, (1) these ~lock files do appear when the file is open -
that's what's frustrating; when it begins to slow
down, I check & discover this inane file has appeared.
(2) I do NOT understand why I should place the file away from the
computer's HD before its completed?;
once completed I copy it to an external HD, but still retain
it on the computer's HD.
(3) I do NOT understand why I, the sole user of this machine, would
not have access to do whatever I wish with this machine 
and the more these machines change, the more I think I should
pitch them out the window and return to the 'horse & buggy' era 
A bug or not a bug ... a bug by any other name would be the same ...
which reminds me of these silly acronyms - there were wasps -
still are - flitting around the woods ... then there were WASPs following
the AAC in WWII ... then there were WASPs - according to the '60s media -
along with other groups back-then.
[and that's just 1 example of how acronyms can become confusing ;-)]