On the new editor, you should see the first button in the third row, in advance view... Click this and it will come up with Table Properties and then you can create your table that way...

Or you can switch to source mode and use the old fashion code...   This is the code for the table above

[ TABLE="class: grid, width: 40%"]

[TR]

[TD]Test Of New Table[/TD]

[TD]Test of a Column[/TD]

[/TR]

[TR]

[TD]12345[/TD]

[TD]67890[/TD]

[/TR]

[TR]

[TD]67890[/TD]

[TD]12345[/TD]

[/TR]

[/TABLE]

[TABLE="class: grid, width: 40%"]

[TR]

[TD]Test Of New Table[/TD]

[TD]Test of a Column[/TD]

[/TR]

[TR]

[TD]12345[/TD]

[TD]67890[/TD]

[/TR]

[TR]

[TD]67890[/TD]

[TD]12345[/TD]

[/TR]

[/TABLE]