Using Match to replace lower quality or DRM music??

I read several web articles that were identical in that they outlined a process to replace lower quality or DRM music with DRM-free AAC (or mpa?) files. This was intriguing in that I have a lot of mp3 files and older DRM-protected files that I'd sure like to clean up. In short, they all said:

1. Subscribe to Match
2. Create smart playlist to find files in your library that are matched or purchased with a quality lower than 256 Kbps, i.e. it is upgradable.
3. Delete these files, making sure to not to select the box that removes the songs from iCloud (to only remove the local, lower quality sound files).

After paying the $25 last night I learned that this isn't an option. When I select delete I only get the option to either delete the file or remove the download. As a test I selected to remove two old mp3 songs (after making copies outside my iTunes library) to see if they would then show as a download...they did not. So I re-imported them back into my library.

Next idea was to use my wife's account on my Mac (her version of iTunes is set as a separate authorized user) and turn match on so I could then download the songs into her library and then copy them over to mine (overwriting the ones I want to replace). Tedious but I think it would work (except I've no clue which songs to copy...I'm afraid if I overwrite a purchased song with a downloaded matched song I could screw things up). Her music library now shows my 2000+ songs (OK, so I have a small library 🙂) as downloadable (except the two I deleted and reimported...they were there but grayed out? Ideas?) but it appears I have to download each one at a time (i.e. no way to select them all and download with one click). Any ideas upon this one?

One of the web sites I mentioned is here:

https://crunchedd.com/20548/drm-free-music-using-itunes-match/