@burnout426 The code below works when opening with the normal left clicking, duo i was not able to add both shortcuts to the task bar and i had to remove the previous one and only add the one with private & no proxy command.
Here is the code :
"C:\Program Files\Opera\launcher.exe" --no-proxy-server= --private
In the end i really hope the Opera adds a simple option to switch between "Using default system proxy" and "not using any proxy" in the settings, i might be mistaken by i think i had seen this option in the earlier versions of the new opera, and i think it has been removed recently, but i still should probably suggest this as a feature in the suggestions thread.
Thanks for your helps.