I'm wondering whether the Lite version is a bit of a cruddy version of this? I can't get it to work with the windows application nor does it seem to save IRG files. Happened upon this blog and you seem to be knowledgable in the field - info online is sparse! Any thoughts? I wrote a slightly ranty reddit post too: https://www.reddit.com/r/Thermal/comments/1b8aqpc/is_the_topdown_tc004_lite_just_a_bit_crap/?