9.1D is ancient, obsolete and unsupported. It has been that way since windows 95 was new and fresh. The right thing to do is to upgrade to OpenEdge 10.2B -- which is a year old now. OpenEdge 11 will be out soon.
So don't get your hopes up about 9.1D working well with Windows 7.
As for your specific question... maybe. Have you tried it? Did you get an error?