I have a website, not developed by me, running MODX Evolution 1.0.15. I would like to bring this up to date, not least for security reasons. However the upgrade documentation starts with 'If you have modified any of the default snippets or plugins...' at which point I get stuck because I do not know how to tell whether the original developer made such modifications or not. I have googled this without success. How can I identify such changes?
Check the Manager Action reports, and if that has been cleared, check the files' dates. If they have been changed, their dates won't match the dates of all of the other files.
For future reference, take a little time to make notes of anything along those lines that you may do, so that you or other developers will know what you've done.