After a product is added in Rapid Products the first field will now auto-focus for long text and pick-list fields. [Change 00137824] (3.88)
The Rapid Products button behavior has been updated from executing OnClick Javascript to redirecting to a URL and will now work seamlessly in the Lightning Experience. [Change 140174] (3.89 - 3.90)

While using Rapid Products, column totals will no longer incorrectly sum to zero on Opportunity Product fields which are read only and contain special characters in the label. [Change 00141787] (3.93)
Resolved an issue where having a large number of fields on Opportunity Product would result in a "Query is either selecting too many fields or the filter conditions are too complicated." error when attempting to open the Rapid Products page. [Change 00146142] (3.94)
Cloning products in Rapid Products will no longer cause a required field error for Opportunity. [Change 00146409] (3.95)

Rapid Products Release Notes 3.88 - 3.95

Support