Adding files to downloaded folder breaks recognizing new files

[marcelreppi]

From an email I received:

if I add a file to the folder that the plugin made, it will stop recognizing the old files and when I go to the moodle to check for new files, it will re download all the files again, is it a bug? is there a way to fix this? I use the plugin to download the moodle course files but then add some files that were missing, and then it won't work anymore to only update it for new files.