To clean up the errors, you need to assign the quote to an existing Prospect or Customer. This may require GridView-RW to update the data. The error results when a prospect with multiple quotes is turned into a customer. The issue has been resolved in the currently shipping version of SalesCQ.

It sounds like there is an environmental or performance issue on the network where SalesCQ is running. You have not described the environment, but assuming a modern server, make sure that OpLocks is Enabled along with SMB2 on all workstations. Make sure there are no XP workstations on the network. Make sure that your anti-virus scanning excludes the Adagio data both from a mapped drive and UNC perspective.