We assume you've already purchased and downloaded the 'Main File(s)' of BitPay for BookingCore.
Your downloaded file will contain two (2) entries:
upload.zip(Which is what you'll extract/upload to BookingCore's plugins directory)
documentation.html(Which, when opened, brings you to the documentation you're reading now)
Extract & Upload
Extract the contents of
upload.zip into the
plugins folder of your BookingCore installation. If your installation is
hosted remotely, upload said contents via cPanel file manager, FTP or SFTP.