Thanks, C1, that sounds like a good strategy for its use.
I did end up buying a couple of licenses and have successfully downloaded the 139 Megabyte executables.
In case anyone cares when you order multiple products the executables delivered seem to be identical (no GUID / uniqueness about them) so you only should need to download one program and just save the multiple license keys it shows you on the web invoice.
The md5 I got was:
4a0aed8ece1569a1b1986c748ec33af8 TrueImage11.8101_s_en.exe
The userguide PDF download for the product doesn't seem to work, it goes to a short / corrupt PDF file. I assume there's a manual installed when you install the software though.
From a discussion I got when googling for the license terms it seems that I wasn't the only one frustrated by not being able to access the EULA or any information on how they handle activation / usage / licensing and questions of use on multiple PCs. Apparently a few people thought it was intended for use on only one PC, though that still doesn't answer the question about uninstalling it and using it on a different PC. The consensus seemed to be that you could in practice use it on as many PCs as you want and that there isn't any "phone home" or online activation checking done.
Overall seemingly a good deal, thanks everyone!