Here is a list of our special versions kept for various tasks:
Use Xojo 2018 Release 4 for current projects in development.
Use Xojo 2018 Release 2 to build for MacOS 10.9.
Use Xojo 2017 Release 2 if you need a 32-bit IDE on Mac.
Use Xojo 2017 Release 1 to build for MacOS 10.7 or with Linux with GTK2.
Use Xojo 2016 Release 3 to use Windows GDI Graphics
Use Xojo 2016 Release 1 to build for Windows Vista.
Use Xojo 2015 Release 2 to build for Windows XP.
Use Xojo 2013 Release 4 to use QuickTime classes.
Use Xojo 2013 Release 3 to build for MacOS 10.6.
Use Xojo 2011 Release 3 to build for PowerPC Macs.
You can read about removals and deprecations on the Xojo documentation in the Deprecations section. We still have a few clients who want their software to run on older operation systems for various reasons. For example special hardware like PCI cards may not work on the latest Windows version due to missing drivers. So they may want to keep an app with ancient Windows version supported.
To download an older Xojo version, you can log into Xojo website, go to download archives. If you have a current license for Xojo, you can certainly ask them for an older license key if needed.
MBS Xojo Plugins in version 19.0 support all Xojo versions and plugins for older Real Studio are available on request.