The following article gives some background information into the upgrade process for North52 BPA. If you ever run into any difficiulties then just drop an email to firstname.lastname@example.org and someone will be happy to help you out.
Standard Upgrade Process
Normally the process of upgrading from one version to another with North52 BPA just involves importing the latest solution file into your CRM system. This means the upgrades are always done in-place and so make the process super easy for customers.
When new features are added to the product you may need to perform additional steps after the import of the solution file to complete the upgrade. Typically this relates to where a new field has been added to one of our entities & we need you to set an appropriate default value on your existing records. If we do require you to perform additional steps then this will be documented for you in a step by step fashion. The best place to start is always at our release history page (link below). This will outline new features and functions along with any required upgrade steps.
CRM 2011 - CRM 2013 Upgrade Process
The CRM 2011 to CRM 2013 just uses our standard upgrade process as outlined above. In order to upgrade to CRM 2013 you need to import release version v188.8.131.525 or later.
CRM 2013 - CRM 2015 Upgrade Process
The CRM 2013 to CRM 2015 just uses our standard upgrade process as outlined above. In order to upgrade to CRM 2013 you need to import release version v184.108.40.2062 or later.