Hi @GM_9894486
You should be able to find the latest releases by following these instructions:
1. Log in to support.ptc.com
2. Select Download Software

3. Select Order or Download Software Updates

4. Select ThingWorx Foundation

5. Expand the desired version

6. Expand the option for the desired database. For example, if running PostgreSQL, expand ThingWorx PostgreSQL. Expand either Most Recent Datecode or Show all Other Available Datecodes to locate the desired version.

To answer your question regarding Java versions, please refer to the System Requirements for the relevant versions:
9.0
9.1
Please let me know if you have further questions.
Regards.
--Sharon