This is what I did in the past:
1. Use a tool like "Beyond compare" to compare your new Innovator installation with the previous version. This way you can discover differences in the code tree. Document all of the differences and merge them to your new server. Some of the official Aras upgrade patches might look not important, but they often are. It´s a huge benefit so have an overview of custom patches, so really document them! In my case I have simply list of all changed files and what´s the pupose of a specific patch.
2. Link existing data base to new server if db server stays the same. Or use the bak file if you have a new database server.
3. I just copied&pasted the previous Vault files to new file Vault. But pay attention! The folder permissions for existing files are destroyed which can lead to an hidden error: There is a change that deleted files aren´t deleted anymore:
Solution: Restore the folder permissions with PowerShell. I expect there is a more professional solution available than Copy&paste, but this is what I did back then.
