Windows, R process is not stopped when TXM is stopped
The R server process is not stopped and one must kill it to restart TXM
see #1349
solution
- the kill command must kill R.exe
- cqp stop process was failing when CQP library is not loaded
see #1349
(from redmine: issue id 2791, created on 2020/03/25 by Matthieu Decorde)