diff --git a/app/client/ui/TutorialCard.ts b/app/client/ui/TutorialCard.ts
index 4146cc43..c224c3ce 100644
--- a/app/client/ui/TutorialCard.ts
+++ b/app/client/ui/TutorialCard.ts
@@ -23,7 +23,6 @@ export function buildTutorialCard(owner: IDisposableOwner, options: Options) {
   const visible = Computed.create(owner, (use) =>
        !use(dismissed)
     && !use(isNarrowScreenObs())
-    && !shouldHideUiElement("templates")
   );
   return dom.maybe(visible, () => {
     return cssCard(
diff --git a/sandbox/grist/schema.py b/sandbox/grist/schema.py
index d000ddb6..0c516965 100644
--- a/sandbox/grist/schema.py
+++ b/sandbox/grist/schema.py
@@ -236,7 +236,11 @@ def schema_create_actions():
       make_column("fileName",     "Text"), # User defined file name
       make_column("fileType",     "Text"), # A string indicating the MIME type of the data
       make_column("fileSize",     "Int"),  # The size in bytes
-      make_column("fileExt",      "Text"), # The file extension
+      # The file extension, including the "." prefix.
+      # Prior to April 2023, this column did not exist, so attachments created before then have a
+      # blank fileExt. The extension may still be present in fileName, so a migration can backfill
+      # some older attachments if the need arises.
+      make_column("fileExt",      "Text"),
       make_column("imageHeight",  "Int"),  # height in pixels
       make_column("imageWidth",   "Int"),  # width in pixels
       make_column("timeDeleted",  "DateTime"),