This is a known bug and it has already been fixed. Unfortunately, you cannot change the available tools for Editor controls that you have already added to a page.
To make the Insert Table icon appear in the Editor toolbar for the new
Editor instances, you need to modify the ToolsFile.xml
file as shown below: <tool name="InsertTable" enabled="true" />
You will see this working properly in the next update.
We are sorry for the inconvenience this is causing.