Components Going Missing in the C9 IDE

I have been experiencing components going missing when building an application. The latest is when calling for Control Templates, the list comes up empty. Another example occurred when using the data dictionary, the process of adding indexes will not allow the selection of fields .
I thought initially the problem was application specific, but I am finding that is not so. I have reinstalled my Clarion9 on a separate machine, which worked well for a while, but is now occurring on the 2nd machine.
Are there any suggestions as to what might the cause be?