End Google Ads 201810 - BS.net 01 --> please ppls help me with this problem.............I made a program with C# and prepare a set up to be installed to the user computer...........but after u install it u can open many instances of the program @ one time............so how can i make it to be opened only 1 @ a time......if i didnt make that my buyer is not going to buy me.......so plz help me(my email is getmati@fastmail.fm )...thank you all