Can it be that you changed in Creator the device to one that hasn't got BLE? Or did you open a project that hasn't got BLE capabilities??
No. The BLE component fails to appear in the component list for any project in PSoC Creator 4.2, including new projects. The device is always the same, and it has BLE.
Can you please post your complete project so that we all can have a look at all of your settings. To do so, use
Creator->File->Create Workspace Bundle (minimal)
and attach the resulting file.
It was not something in an individual project. It was a bug in PSoC Creator v. 4.2 itself as it was installed on my PC.
The component finally reappeared when I:
1) Uninstalled PSoC Creator v. 4.2
2) Made sure all associated files in my Documents directory were deleted
3) Reinstalled PSoC Creator v. 4.2 choosing complete install instead of typical install
4) Installed all updates.