Ken, I don't have v20 Perpetual or Magix v20. I did get a copy of v19 (Perpetual) and I shall assume the content is similar to v20 (P).

The first thing to do is locate your v20 (P) content.
It should be in C:\Program Files\Xara\[Xara Product]\clipart\ENG\components\layoutcomponents\tables_18 _0\.

Mine shows as:
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I hope you have similar.

If so, which one is it you have? Is it missing? Or, does it misbehave?

When opening, it is possible you are actually use a pre-v19 version and Xara is trying to make it work to the new standard Table Tool.

Do you not see all the 'missing' content in your Designs gallery?
I don't know if Xara offers any search mechaism for v20 (P) content but some is in the firstlook, components and websites where the items may be customised.

Copy an image that is on the page.
In a table pick the text in the cell with the Text tool and paste.
The graphic is now embedded and moves with the Row, Column and Text.

Acorn