%LocalAppData%\Microsoft\Windows\Explorer contains thumbcache_*.db files

Open these with the thumbcache viewer to be able to see a cached copy of all Extra Large Icon images, Large Icons, Medium, etc.


Run this from Windows Run to delete the cache files:
cmd /c del /f /s /q "%LocalAppData%\Microsoft\Windows\Explorer\thumbcache_*.db"


thumbcache_32.db	32×32		Small Icons
thumbcache_96.db	96×96		Medium Icons
thumbcache_256.db	256×256		Large Icons
thumbcache_768.db	768×768		Extra Large Icons (older versions)
thumbcache_2560.db	2560×2560	Extra Large Icons (modern systems)


You can download the thumbnailcache viewer from here:
https://thumbcacheviewer.github.io/