The report claims it's BSD licensed, but the site talks about downloading a 15-day evaluation, and buying a perpetual license for $8, linked to a specific e-mail address.
Poking around in the download, I found a file (i4j_extf_7_en4o59.html) in the distribution containing
- o Apache License, Version 2.0
- o PYTHON SOFTWARE FOUNDATION LICENSE VERSION 2
- o [various phrasings of the MIT license]
- o GNU LESSER GENERAL PUBLIC LICENSE Version 3
- o GNU GENERAL PUBLIC LICENSE Version 3
- o UBUNTU FONT LICENCE Version 1.0
So what's the deal? I'm not up for searching the various .jars to find a time bomb, but if there's one there, the licensing says you can remove it and go your merry way. (Of course, if you find the product useful, sending $8 would be a reasonable thing to do.)