Once a product is built, it's splitable setting can be adjusted either on screen or via an export file.
On screen 1 product at a time
Update 1 product at a time following the below steps:
Log into Procure Wizard.
Click into Price Lists and click into Locate Product.
Search for the product by SKU/PID/Key Word.
From the Product Settings tab toggle, the Is Splitable field between No/Yes and click Save Settings to confirm the changes.
On mass via import/export file
Update products in batch via import/export, following the below steps:
Click into Price Lists and into Export Price Lists.
Click Export and then click Complete Export.
Open the document and update Column V to Yes or No.
Import the file and import back via Import Price Lists.