The attached document is an upgrade guide that will take you thru the steps and the important considerations for the upgrade from Lisa 7.5.x to the latest and exciting release of DevTest 9.1.
Remember we now support in-place upgrade from 7.5.x to 9.x which means you can install in the same location as your prior release and you can also use you existing database which will be upgraded automatically for the 9.1 release!!
Enjoy!
Thanks,
- Koustubh