We have produced a PDF document that shows the current and historic compatibility/pairings of HDR Light Studio and Connection builds. This is useful for customers using permanent licenses with expired maintenance. Customers with Subscription licenses - you can always use the latest builds from our downloads page.
Below is an example page from the PDF. You can see the HDR Light Studio build at the top of each page. Beneath is the list of compatible Connections and their build dates. You can download historic builds of HDR Light Studio and Connection from the Downloads Archive.