Located in the Files section is a folder called 1 - Old Yahoo Messages. Here are the notes on that file -
All of the old Yahoo Messages from #1 to Nov. 31, 2019 in a txt file of 10 mb. This file is too large to open using the regular Notepad but the free Notepad++ opens it fast. This file requires further editing to remove Yahoo text formatting data that either starts with <!-- #ygrps or #ygrps. This will be done as time permits. Search using the Find function.
73 Roger VE7LB