I thought they wouldn't.
The reason , and explanation what you need to do, is as follows.
The guy who shared the saved
forgot edit:
refused (the meanie!) to include the global.rpgsave file. Without it your game do not recognize saves. Always include said file because if you don't, one has to do this to make it work.
Check the saves and notice how they are named file13, file14 and file15.rpgsave. This means they will occupy save slot 13, 14 and 15 in your game. Launch your game and start a new or load a save if you have one. Then open save menu and save your game three time. Make sure you save to the slot 13, 14 and 15!
(You can alternatively rename the save files to, for example file1, file2 and file3.rpgsave or whatever, the numbers will represent which save slot they will occupy and to those slots you will have to save within the game first.)
Then exit the game. This way your game creates the necessary global.rpgsave file and has file13, file14 and file15. Now you replace those with the ones you downloaded and voila, the saves will function.
One doesn't have to do this when the person who shares saves share global.rpgsave as well. Otherwise you will have to do this saving/renaming/replacing thing.