Solidworks still thinks Excel is open after closing Design Table

I now have lost a lot of work with a little bug.

I open a design table, make some modifications. Than exit Excel.

Except Solidworks still thinks Excel is open.

And I have to kill sldworks.exe in task manager, and lose all my work.

This happens like 2 out of 10 times. So it is a bit russian roulette with design tables.

Off course I contacted my var, and they tried to reproduce it, and off course it did not happen.

And they simple said we can't fix anything that we can't see....

I did a complete repair on Solidworks and Excel.

Both did nothing.

I am using  excel 2010 and solidworks 2017.

Hope some one can help me with this or acknowledge if this is happening with themself. I did not had this issue in sw2016.

SolidworksParts And Features