Cant download new patch while diablo 2 is running

I recently downloaded both versions of diablo II and have been running into a whirlwind of problems. after figuring out the compatibility issue, I then went to try battle.net again. This time the patch went to download and then gave me the message of "cant download patch while diablo II is open. when i use the alt-tab option to close the program so the update can commence, the game and BNUpdate programs are one. since i cannot close diablo 2 without closing the BNUpdate i am lost at what to do next. When i close diablo and just try to open the BNUpdate it says “this program is used to upgrade programs through battle.net and does not need to be run” how am i able to update my patch and play online?

I would download the patch manually. Has worked for me and others too…