When we upgraded to Core a few years ago, there was not Conversion tool available. I rebuilt all of the workflows manually. Only took a few days for 50+ workflows.
There are no tools or documentation for converting from Process Manager to FFCore Max. FFCore Help describes the MAX functionality. There are also examples of using MAX in the Easy Starts. One could contact the Xerox Solution Engineering team to potentially build a script(s) to convert the MAX submission (e.g., csv) files. The setup on the Hotfolder MAX GUI would still need to be done manually.
I started from scratch and did the setup my self.
The only Issue I still have is file location I have to move my repository to the same server that has FF Core installed on it, because Corp IT would not allow the settings that Xerox recomended to be able to get files from another server on our Active Directory domain.