So to what version did you downgrade to make it working?
5.9.3 (Compilation 7136)
If you upgrade back to 5.9.5 does it stop working again?
It works perfect already.
How exactly did your downgrade?
a) Uninstall the version that caused the problem.
b) Removing the version without removing traces of the application on this computer.
c) Restarting the computer
Now,when performing the reverse steps to re-perform the upgrade, it worked again and without problems.
Thank you very much Martin.