Easiest solution is to create a text file
Then in Thinking Rock, click File, Import, Thoughts
The file format is on line for each thought, and optionally Tab followed by topic.
This import thoughts, which then should be processed. With the paid version 3.x there are improvements that make this better. For instance, you can quickly process all thoughts, then multi select to change topic, context, etc. I use this often for planning in a simple text editor or mind mapping tool, then importing into thinking rock.
Hope this helps,
Dwight