Using Mac mini M4 Tahoe 26.0.1. Installed Lulu_4.1.0.dmg. Got dialog to approve system extension.

Activity monitor shows Lulu is running. I see PID=1384, however, Lulu does not appear in the Force Quit dialog.

I tried this AppleScript:
tell application "System Events"
tell process "Lulu"
repeat with wnd in every window
set position of wnd to {40, 40}
end repeat
end tell
end tell

I get:
Script Error
System Events got an error: Can't get process "Lulu".

Looking in SystemSettings->Login Itens & Extensions->Extensions->Lulu (Network Extension) I see one extension installed.
Looking in Extensions "By Category"->Network Extensions (Lulu)->...->Reveal in Finder I see:
com.objective-see.lulu.extension.systemextension with a Path showing:
Macintosh HD->Library->SystemExtensions->42924146-D5F2-40BC-98D1-B6F4C91D01DA

Finally, Activity Monitor Open Files and Ports for Lulu(1384) shows this:
/
/Applications/LuLu.app/Contents/MacOS/LuLu
/Library/Preferences/Logging/.plist-cache.vad78KUP
/private/var/db/analyticsd/events.allowlist
/System/Library/CoreServices/SystemVersion.bundle/English.lproj/SystemVersion.strings
/System/Library/CoreServices/SystemAppearance.bundle/Contents/Resources/AccessibilitySystemAppearance.car
/usr/lib/dyld
/System/Library/CoreServices/SystemAppearance.bundle/Contents/Resources/FauxVibrantDark.car
/usr/share/icu/icudt76l.dat
/System/Library/CoreServices/SystemAppearance.bundle/Contents/Resources/Aqua.car
/System/Library/CoreServices/SystemAppearance.bundle/Contents/Resources/FauxVibrantLight.car
/System/Library/CoreServices/SystemAppearance.bundle/Contents/Resources/VibrantLightAX.car
/System/Library/Frameworks/AppKit.framework/Versions/C/Resources/Common.loctable
/System/Library/Frameworks/AppKit.framework/Versions/C/Resources/AccessibilityImageDescriptions.loctable
/System/Library/CoreServices/SystemAppearance.bundle/Contents/Resources/SystemAppearance.car
/System/Library/CoreServices/SystemAppearance.bundle/Contents/Resources/DarkAqua.car
/System/Library/CoreServices/SystemAppearance.bundle/Contents/Resources/DarkAquaAX.car
/System/Library/CoreServices/SystemAppearance.bundle/Contents/Resources/VibrantDarkAX.car
/System/Library/CoreServices/SystemAppearance.bundle/Contents/Resources/VibrantDark.car
/System/Library/Frameworks/AppKit.framework/Versions/C/Resources/InputManager.loctable
/System/Library/PrivateFrameworks/SFSymbols.framework/Versions/A/Resources/CoreGlyphs.bundle/Contents/Resources/Assets.car
/usr/lib/libobjc-trampolines.dylib
/System/Library/Frameworks/AppKit.framework/Versions/C/Resources/MenuCommands.loctable
/System/Library/Caches/com.apple.IntlDataCache.le.kbdx
/System/Library/Keyboard Layouts/AppleKeyboardLayouts.bundle/Contents/Resources/AppleKeyboardLayouts-L.dat
/System/Library/Keyboard Layouts/AppleKeyboardLayouts.bundle/Contents/Resources/InfoPlist.loctable
/System/Library/CoreServices/SystemAppearance.bundle/Contents/Resources/AquaAX.car
/Applications/LuLu.app/Contents/Resources/Assets.car
/System/Library/Fonts/HelveticaNeue.ttc
/Users/rreitz/Library/HTTPStorages/com.objective-see.lulu.app/httpstorages.sqlite-shm
/Users/rreitz/Library/Caches/com.objective-see.lulu.app/Cache.db-shm
/System/Library/Frameworks/CFNetwork.framework/Versions/A/Resources/DafsaData.bin
/System/Library/CoreServices/SystemAppearance.bundle/Contents/Resources/VibrantLight.car
/System/Library/Fonts/SFNS.ttf
/System/Library/Fonts/Helvetica.ttc
/System/Library/Extensions/AGXMetalG16G_B0.bundle/Contents/MacOS/AGXMetalG16G_B0
/System/Library/Extensions/AGXMetalG16G_B0.bundle/Contents/Resources/ds.g16g
/private/var/folders/j9/_5rty8fx44z3sthwq32tcbrc0000gn/0/com.apple.LaunchServices.dv/com.apple.LaunchServices-16777237-v2.csstore
/dev/null
/dev/null
/dev/null
/Users/rreitz/Library/HTTPStorages/com.objective-see.lulu.app/httpstorages.sqlite
/Users/rreitz/Library/HTTPStorages/com.objective-see.lulu.app/httpstorages.sqlite-wal
/Users/rreitz/Library/HTTPStorages/com.objective-see.lulu.app/httpstorages.sqlite-shm
[ctl com.apple.netsrc id 7 unit 80]
/Users/rreitz/Library/Caches/com.objective-see.lulu.app/Cache.db
/Users/rreitz/Library/Caches/com.objective-see.lulu.app/Cache.db-wal
/Users/rreitz/Library/Caches/com.objective-see.lulu.app/Cache.db-shm
/Users/rreitz/Library/Caches/com.objective-see.lulu.app/Cache.db
/Users/rreitz/Library/Caches/com.objective-see.lulu.app/Cache.db-wal

Thanks.
Randy