Site of promotion
https://www.gpsoft.com.au/order_intro.html
Instructions
To take advantage of this sale, use the coupon code NEWYEAR2020 before January 27th, 2019.

  • To upgrade or buy new copies of Opus 12, visit the Directory Opus online purchase page.
  • To add licences and optional features to your existing licence, login to the My Account page.
  • Discount applies to personal licences (maximum 5 installs) only. Only available from the GP Software website.

R2D2

Level 4
Additional details from the email. The coupon code offers a nice 40% off on DOpus Light & Pro licenses. PLUS:
  1. Upgrades from Opus 11 or earlier to Opus 12 are 40% off
  2. Extra licences are 40% off
  3. Optional features like Advanced FTP and USB export are 40% off
I prefer this utility over Total Commander and XYplorer.