This link takes you to virtually every download that you’ll need for working with installation and upgrading Sage 100 versions 4.5 through 2016 (versions prior to 4.5 are no longer supported by Sage however you may be able to still find download links if you search their knowledgebase).
For the year end 2016 apply:
- Product update
- Interim release download for 2015
- Tax Table Update (only if the payroll module is installed)
If you wondering when your version of Sage 100 will stop being supported by Sage, check this Sage 100 Supported Versions list.