Here's what I would do in your shoes:
- Disable or delete the other table plugins I've mentioned, if applicable
- Install the MultiMarkdown Table Tools plugin if you haven't already done so
- Click the
Create table
toolbar button with the table icon - Click the
Create table
dialog button after adjusting rows, columns, and header settings - Populate a table cell
- Press Tab to tab through and auto-resize the table
These steps work on my machine. If they don't work for you, please let us know.