I have Windows 10, & WordPerfect x7. I cannot change numbers in a book manuscript. Why?

I have tried everything WordPerfects Help says to do, and in the Value box, after I enter the number, and check to ascsending click and OK, it changes

I have tried everything WordPerfect's Help says to do, and in the Value box, after I enter the number, and check to ascsending click and OK, it changes back to keep the number the same. Is it because WordPerfectX7 doesn't work with Windows 10?

or:I have tried everything WordPerfect's Help says to do, and in the Value box, after I enter the number, and check to ascsending click and OK, it changes back to keep the number the same. Is it because WordPerfectX7 doesn't work with Windows 10?

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