I haven't designed reloaded to be able to load old saves, so it wouldn't be possible to just load it.
It is possible to convert the save, but it involves editing the savefile and replacing all the sprite and object IDs with the ones from reloaded, as well as replacing all the integer item IDs with the new string IDs, and also adding the missing variables to all the structures. It is probably possible to write a script for that, but other than that, if you try to load an old save into reloaded, it would probably crash.