Hi Mark,
I just installed the 2020 personal version. I note that the upgrade instructions indicate that the data files are saved in a new format and that FM will warn me that me about that. After the install I updated prices and closed the program, but there was no warning. Not a problem for me - just letting you know.
Another related question. I looked at the modified dates and note that only the updated files were changed, and therefore presumably the only ones updated to the new format. I have many investments that are closed. Doesn't it make more sense to have all files in the same format? If so, is there an easy way to get them all updated?
Thanks,
Ivan