Sorry for answering you late. As written on the download page, the 32bits version of System Workbench is no longer maintained due to incompatibility issues. The latest version was release in April 2017 when java highest version was 1.8.0.
Indeed you are right about the 2 digit problem as it was not expected from Oracle to jump from 1.8.0 to 11.0.3. This problem was fixed on the Linux 64bits installer but still remained on the older 32bits installer.
Sorry again for the troubles you experienced.