FLIR Tools. They don’t make it easy to find anymore but they have their FLIR tools software that is free. You can view the IR images change parameters and create reports. Don’t use Tools+ unless you want to pay. I don't have the H20T I use the XT2 on my Matrice and I can copy the images to my laptop and edit from there. The Radiometric data is stored in the .JPG file and is viewable in FLIR tools. Unless DJI locked or changed the encryption on the H20T then it should work. There are also software options to convert files but that is not something I am familiar with.
The Freedom to Choose Your Own Path!Obtain better speed, flexibility, and accuracy during your inspection and post-inspection process by utilizing Thermal Trend – Lean DB.