ShareX is free and Open Source and you can download it from the ShareX website and once downloaded proceed to install ShareX on your computer.
Run the ShareX Setup file you just downloaded (ShareX-14.1.0-setup.exe) and follow the installation wizard.
Once you’ve installed ShareX click ‘Destinations’ from the navigation menu and choose ‘Custom uploader settings…’
Choose ‘Import’ and ‘From URL…’ and copy and paste: https://uploadme.me/getsharex.txt into the input field.
Close the window then click ‘Destinations’ again and change Image uploader to ‘Custom Image uploader’.
If you want an image to upload automatically after capture set ‘After capture tasks’ to ‘Upload image to host’