We do not charge any upgrade fees for Trefik new versions. It does not matter if you have bought the licence for Trefik 1 or Trefik 11 you can still download the latest version for free. Just the data updates are charged - for 0.75 EUR per week.
You can download the recent version directly from your Trefik using the feature: Update / New Version. If you download the file from this page please save the file into your Trefik folder - rewrite your previous Trefik12.exe file.
Trefik offers the dowload of the new version always if it is available. If you see the yellow button NEW VERSION please click this button and download new Trefik - this is our recommendation.