Per a customer's request, a Reset button (screenshot attached) has now been added to the Easy Pricing Apps at the Product Line Item level. This new button allows the end user to reset the Product Line record first before switching to the desired Pricing Rule. If you are interested in this new feature, it's available in our latest release (Version 3.6.0, release date: 05/17/2020) on AppExchange.

Easy Pricing for Opportunity - https://appexchange.salesforce.com/appxListingDetail?listingId=a0N3A00000FAE08UAH

Easy Pricing for Quote - https://appexchange.salesforce.com/appxListingDetail?listingId=a0N3A00000FAE0IUAX