Thanks Dear Friend,
But I missed to precise that, yesterday evening, I already :
- configured FW to allow public connection to Bandlab Assistant & disabled Antivirus Scan during operation,
- Executed Bandlab in Administrator mode (using right click on launcher icon ...)
But failed ...
I probably have to reinstall Bandlab Assistant and change download Directory path which is pointing currently to .AppData\Roaming ...
Many thanks for your help.