How can I re-install missing Plug-In (Database Query) ?

Hi -
I inadvertently removed the Database Query from the Plug-ins page. I must have unchecked it, and then hit apply. Now it is gone. :(
Is there a process to restore it? It is not listed in Inactive PlugIns.
Thanks in advance

Here are the contents of the directories identified on the information page:

tc@LivingRoomLMS:/mnt/LRLMS/slimserver/Cache/InstalledPlugins/Plugins$ ls -al
total 48
drwxr-xr-x 12 tc staff 4096 Nov 24 15:18 ./
drwxrwxr-x 3 tc staff 4096 Sep 6 14:03 ../
drwxr-xr-x 3 tc staff 4096 Sep 6 14:03 CustomClockHelper/
drwxr-xr-x 5 tc staff 4096 Nov 21 13:29 DSDPlayer/
drwxr-xr-x 3 tc staff 4096 Sep 6 21:15 LicenseManagerPlugin/
drwxr-xr-x 3 tc staff 4096 Nov 7 16:56 MaterialSkin/
drwxr-xr-x 6 tc staff 4096 Nov 10 11:17 MusicArtistInfo/
drwxr-xr-x 3 tc staff 4096 Sep 6 14:23 PowerSave/
drwxr-xr-x 6 tc staff 4096 Nov 16 13:56 RaopBridge/
drwxr-xr-x 5 tc staff 4096 Nov 16 13:56 ShairTunes2W/
drwxr-xr-x 8 tc staff 4096 Nov 19 14:58 Spotty/
drwxr-xr-x 4 tc staff 4096 Nov 9 08:59 SuperDateTime/

/usr/local/slimserver/Plugins
(no such directory)

/usr/local/slimserver/Cache/Plugins
(no such directory)

however, this directory has related files
/mnt/LRLMS/slimserver/Cache$ ls -al

drwxrwxr-x 8 tc staff 4096 Nov 24 16:41 ./
drwxrwxr-x 4 tc staff 4096 Sep 6 12:50 ../
drwxrwxr-x 2 tc staff 4096 Nov 21 13:29 DownloadedPlugins/
drwxrwxr-x 3 tc staff 4096 Sep 6 14:03 InstalledPlugins/
-rw-r--r-- 1 tc staff 16384 Nov 24 15:14 PluginCache-DatabaseQuery.db
-rw-r--r-- 1 tc staff 32768 Nov 24 15:14 PluginCache-DatabaseQuery.db-shm
-rw-r--r-- 1 tc staff 477952 Nov 24 15:14 PluginCache-DatabaseQuery.db-wal
-rw-r--r-- 1 tc staff 16384 Oct 14 23:42 PluginCache-LicenseManagerPlugin.db
-rw-r--r-- 1 tc staff 32768 Oct 17 07:15 PluginCache-LicenseManagerPlugin.db-shm
-rw-r--r-- 1 tc staff 127752 Oct 17 07:15 PluginCache-LicenseManagerPlugin.db-wal
-rw-r----- 1 tc staff 24576 Nov 24 14:45 __db.001
-rw-r----- 1 tc staff 139264 Nov 24 14:45 __db.002
-rw-r----- 1 tc staff 270336 Nov 24 14:45 __db.003
-rw-rw-r-- 1 tc staff 367456256 Nov 24 16:22 artwork.db
drwxrwxr-x 2 tc staff 4096 Sep 6 12:51 audioUploads/
-rw-rw-r-- 1 tc staff 45436928 Nov 24 17:40 cache.db
-rw-rw-r-- 1 tc staff 32768 Nov 24 17:40 cache.db-shm
-rw-rw-r-- 1 tc staff 8207072 Nov 24 17:40 cache.db-wal
-rw-rw-r-- 1 tc staff 1774 Nov 24 16:36 cookies.dat
-rw-rw-r-- 1 tc staff 3448 Sep 15 22:47 extrastrings.json
-rw-rw-r-- 1 tc staff 4900216832 Nov 24 16:22 imgproxy.db
-rw-rw-r-- 1 tc staff 32768 Nov 24 16:37 imgproxy.db-shm
-rw-rw-r-- 1 tc staff 0 Nov 24 16:37 imgproxy.db-wal
-rw-rw-r-- 1 tc staff 731 Sep 6 12:51 infobrowser.opml
-rw-rw-r-- 1 tc staff 165 Sep 6 12:51 infobrowser.opml.backup
-rw-r----- 1 tc staff 8192 Nov 24 13:22 libmediascan.db
-rw-rw-r-- 1 tc staff 270012416 Nov 24 16:41 library.db
-rw-rw-r-- 1 tc staff 32768 Nov 24 17:40 library.db-shm
-rw-rw-r-- 1 tc staff 3728632 Nov 24 17:40 library.db-wal
drwxr-xr-x 2 tc staff 4096 Sep 7 01:00 mai_coverart/
-rw-rw-r-- 1 tc staff 31277056 Nov 24 16:41 persist.db
-rw-rw-r-- 1 tc staff 32768 Nov 24 17:40 persist.db-shm
-rw-rw-r-- 1 tc staff 362592 Nov 24 17:40 persist.db-wal
-rw-rw-r-- 1 tc staff 33578 Nov 24 15:18 plugin-data.yaml
drwxr-xr-x 3 tc staff 4096 Sep 6 20:49 spotty/
-rw-r--r-- 1 tc staff 1966080 Nov 24 16:36 spotty.db
-rw-r--r-- 1 tc staff 32768 Nov 24 17:40 spotty.db-shm
-rw-r--r-- 1 tc staff 3485552 Nov 24 17:40 spotty.db-wal
-rw-rw-r-- 1 tc staff 204648 Nov 24 15:18 stringcache.armv8l-linux.bin
drwxrwxr-x 4 tc staff 12288 Nov 24 16:41 templates/