Ctrl + F5 will refresh indexed properties on selected folders too, just not subfolders/files inside that folder.
I will consider a recursive option on Ctrl + F5.
However, that could be undesirable. Depends on what properties you are indexing for folders.
I also consider a search command to do a recursive indexed property refresh.
So you can at least setup a bookmark with a keyboard shortcut to do what you want.
For now, you'll need to rescan the folder with:
/rescan c:\path\to\folder
then search for:
"c:\path\to\folder\"
Select all results and hit Ctrl + F5.
Refreshing indexed properties shouldn't be necessary.
/rescan c:\path\to\folder
should pickup any changes and update your indexed properties.
What values are missing (or outdated) from your indexed properties?