- Download app, extract Atchup.exe, but don't open the app yet.
- Start Blackshot, wait until character select. Then alt+tab, Run Atchup.exe as administrator.
- Alt+tab again to BS, enter lobby, enter room. done.
- Start Blackshot, wait until character select. Then alt+tab, Run Atchup.exe as administrator.
- Alt+tab again to BS, enter lobby, enter room. done.



. But thanks for making the video tutorial @