I cannot do what you suggested. I get a screen that tells me that Windows
cannot open the file unless it knows who created it. I can go online for an
answer, but I get Corel Word Perfect and how to purchase it!
You shouldn't be getting this unless you have "Confirm conversions at open"
checked (Tools | Options | General), but if you do get the dialog, then
select the appropriate version of WordPerfect in the list.