Looks like $SELFDIR not working properly.
curl -LO https://bintray.com/artifact/download/blahah/generic/transrate-1.0.2-linux-x86_64.tar.gz
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
0 0 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0
0 0 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0
100 27.7M 100 27.7M 0 0 3854k 0 0:00:07 0:00:07 --:--:-- 2382k
macmanes@Pinky:~$
macmanes@Pinky:~$ tar -zxf transrate-1.0.2-linux-x86_64.tar.gz
macmanes@Pinky:~$ cd transrate-1.0.2-linux-x86_64/
macmanes@Pinky:~/transrate-1.0.2-linux-x86_64$ ls -lth
total 12K
drwxr-xr-x 2 macmanes macmanes 4.0K Feb 20 18:22 bin
drwxr-xr-x 3 macmanes macmanes 4.0K Feb 20 18:22 lib
-rwxr-xr-x 1 macmanes macmanes 1.1K Feb 19 15:11 transrate
macmanes@Pinky:~/transrate-1.0.2-linux-x86_64$
macmanes@Pinky:~/transrate-1.0.2-linux-x86_64$ ./transrate -h
./transrate: line 36: //lib/app/ruby/bin/ruby: No such file or directory
Sorry about that - packaging issue. Should be fixed now...