I'm not sure then, perhaps it needs some of the files from the standalone program. I installed with the deb so perhaps try putting the other files in the locations they would have gone.
It's more likely that it needs some of the libraries that it relies on installed, as that's what a deb package ensures. It's also unlikely that all of those would be available on Gentoo or any other non-Debian based distro. You can verify this by doing something like:
Code: Select all
$ ldd libsitala.so | grep 'not found'
But again, unfortunately, as a general rule, you can't move Linux binaries across different distributions and expect them to work.