Hmm,
Indeed MODO Bass 1.5.2 does not have any plug-in automation parameters here. I do not know about v1.5.1 or earlier.
For your projects, can you go back to the previous version? Go to your User Area / My Products, and under MODO Bass, click [Past releases]. Download v1.5.1. Uninstall v1.5.2 and reinstall v1.5.1.
Disclaimer: I have not done this myself, so make back-ups of any presets etc. I do not think that it will upset the IK Product Manager.
Also,
contact Support, via here. There is a link at the top of the Search FAQs page to the Technical Support form, for some one to one investigation and help. Response time is usually within 2 working days (US (East Coast) Business hours, generally), but in the current circumstances please allow some more time.