Many people have had problems running the setup package last published, and I've identified the source of the problem.
The last installation package, unbeknownst to me, included a few system DLLs which really didn't need to be distributed, as they were almost certain to be on the user's system anyway, and probably in more recent versions.
To all who have tried to install UnZixWin 0.0.9 without success, try downloading this more svelte package. With just a bit of luck, it will work much better.
It is still version 0.0.9, with a minute bugfix. You can now open and analyze files which are still being seeded and/or played. Previously, UnZixWin required exclusive access to the file. This requirement has been removed.