Thks for responding. After posting the problem, I re-installed the Steam open-beta-public version (I opted for the open beta, which did not let me start DCS, and then opted back to the open bete-public). This resolved the problem. Now the moduels are rendering properly. The vaicompro add-on also picks up the module radios, which it did not do before I re-installed the open-beta-public. So, my conclusion is that something must have been reset, when I did the re-install. Hopefully, this problem does not come back, as it prevents me from flying.