diff --git a/news.d/bugfix/1842.core.md b/news.d/bugfix/1842.core.md
new file mode 100644
index 000000000..a82be3ece
--- /dev/null
+++ b/news.d/bugfix/1842.core.md
@@ -0,0 +1 @@
+If plover_plugins does not have arguments, print available arguments and exit.
diff --git a/news.d/bugfix/1842.windows.md b/news.d/bugfix/1842.windows.md
new file mode 100644
index 000000000..24362b45f
--- /dev/null
+++ b/news.d/bugfix/1842.windows.md
@@ -0,0 +1 @@
+Update Windows installer NSI to remove all files.
diff --git a/plover/plugins_manager/__main__.py b/plover/plugins_manager/__main__.py
index 96538bcb8..324286df5 100644
--- a/plover/plugins_manager/__main__.py
+++ b/plover/plugins_manager/__main__.py
@@ -82,6 +82,10 @@ def list_plugins(freeze=False):
 def main(args=None):
     if args is None:
         args = sys.argv[1:]
+    if not args:
+        print("Usage: plover_plugins <command> [args]")
+        print("Commands: list_plugins [--freeze], check, install, uninstall, list")
+        sys.exit(2)
     if args[0] == "list_plugins":
         assert len(args) <= 2
         if len(args) > 1:
diff --git a/windows/installer.nsi b/windows/installer.nsi
index 762250581..8777c1df1 100644
--- a/windows/installer.nsi
+++ b/windows/installer.nsi
@@ -111,9 +111,11 @@ SectionEnd
 Section "Uninstall"
 
   RMDir /r "$INSTDIR\data"
+  RMDir /r "$INSTDIR\hidapi-src"
   Delete "$INSTDIR\LICENSE.txt"
   Delete "$INSTDIR\plover.exe"
   Delete "$INSTDIR\plover_console.exe"
+  Delete "$INSTDIR\vcruntime140.dll"
   Delete "$INSTDIR\uninstall.exe"
   RMDir "$INSTDIR"