Hi, Tom,
How are you changing the Column Width? Are you doing this from the grid itself similar to how you would do it in Excel? That wouldn't stick.
However, the Column Widths I've tried changing within the Column Editor itself do seem to be sticking. How many columns do you have on your grid?
Are you saving your screen size within your File | User Preferences?
Edited by Softrak Support (12/02/15 12:10 PM)
Edit Reason: added another question
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Softrak Tech Support