We are managing Software in ITAM 14 and using a Product Upgrade - Upgrade to custom relationship. The only choices to search to link assets together are for Asset Name, Asset Alias, Serial number, and Quantity. We need fields such as PO or License key to look up specific software assets that we need to link to old purchases. SW does not have serial numbers. Need ability to add other fields or give "classic" drop down list functionality if customer wants to configure the application to user it.