diff --git a/TablePro/Core/Services/Export/ExportFormatCatalog.swift b/TablePro/Core/Services/Export/ExportFormatCatalog.swift
index afb640bcf6..f1ee56830a 100644
--- a/TablePro/Core/Services/Export/ExportFormatCatalog.swift
+++ b/TablePro/Core/Services/Export/ExportFormatCatalog.swift
@@ -12,12 +12,23 @@ internal enum ExportFormatCatalog {
         "csv", "json", "sql", "xlsx", "md", "parquet", "mql"
     ]
 
+    // scripts/release/registry.py writes no exportFormatIds yet, so Parquet stays offered by hand until it does.
+    private static let unlistedInstallable = [
+        InstallableExportFormat(
+            formatId: "parquet",
+            displayName: "Parquet",
+            registryPluginId: "com.TablePro.ParquetExportPlugin"
+        )
+    ]
+
     internal static func installable(in manifest: RegistryManifest?) -> [InstallableExportFormat] {
-        (manifest?.plugins ?? []).flatMap { plugin in
+        let listed = (manifest?.plugins ?? []).flatMap { plugin in
             (plugin.exportFormatIds ?? []).map { formatId in
                 InstallableExportFormat(formatId: formatId, displayName: plugin.name, registryPluginId: plugin.id)
             }
         }
+        let listedFormatIds = Set(listed.map(\.formatId))
+        return listed + unlistedInstallable.filter { !listedFormatIds.contains($0.formatId) }
     }
 
     @MainActor
diff --git a/TableProTests/Core/Export/ExportFormatCatalogTests.swift b/TableProTests/Core/Export/ExportFormatCatalogTests.swift
index 9335d7627b..3a89827314 100644
--- a/TableProTests/Core/Export/ExportFormatCatalogTests.swift
+++ b/TableProTests/Core/Export/ExportFormatCatalogTests.swift
@@ -128,22 +128,45 @@ struct ExportFormatCatalogTests {
         )
     }
 
-    @Test("The manifest's export-format ids are what the catalog offers to install")
+    private let handParquet = InstallableExportFormat(
+        formatId: "parquet",
+        displayName: "Parquet",
+        registryPluginId: "com.TablePro.ParquetExportPlugin"
+    )
+
+    @Test("Parquet is offered while the manifest names no export format")
     @MainActor
-    func installableComesFromTheManifest() {
-        let listed = manifest([
+    func parquetOfferedWithoutManifestFormats() {
+        let unlisted = manifest([
             registryPlugin(id: "com.TablePro.OracleDriver", name: "Oracle Driver", exportFormatIds: nil),
-            registryPlugin(id: "com.TablePro.ParquetExportPlugin", name: "Parquet Export", exportFormatIds: ["parquet"])
+            registryPlugin(id: "com.TablePro.ParquetExportPlugin", name: "Parquet Export", exportFormatIds: nil)
         ])
 
-        #expect(ExportFormatCatalog.installable(in: listed) == [
-            InstallableExportFormat(
-                formatId: "parquet",
-                displayName: "Parquet Export",
-                registryPluginId: "com.TablePro.ParquetExportPlugin"
-            )
+        #expect(ExportFormatCatalog.installable(in: nil) == [handParquet])
+        #expect(ExportFormatCatalog.installable(in: unlisted) == [handParquet])
+        #expect(ExportFormatCatalog.notInstalled(installedFormatIds: [], manifest: nil) == [handParquet])
+        #expect(ExportFormatCatalog.notInstalled(installedFormatIds: ["parquet"], manifest: nil).isEmpty)
+    }
+
+    @Test("A format the manifest lists is offered once, from the manifest")
+    @MainActor
+    func manifestFormatsReplaceTheHandEntry() {
+        let listed = manifest([
+            registryPlugin(id: "com.TablePro.ParquetExportPlugin", name: "Parquet Export", exportFormatIds: ["parquet"]),
+            registryPlugin(id: "com.example.AvroExport", name: "Avro Export", exportFormatIds: ["avro"])
         ])
-        #expect(ExportFormatCatalog.notInstalled(installedFormatIds: ["parquet"], manifest: listed).isEmpty)
-        #expect(ExportFormatCatalog.notInstalled(installedFormatIds: [], manifest: nil).isEmpty)
+        let parquet = InstallableExportFormat(
+            formatId: "parquet",
+            displayName: "Parquet Export",
+            registryPluginId: "com.TablePro.ParquetExportPlugin"
+        )
+        let avro = InstallableExportFormat(
+            formatId: "avro",
+            displayName: "Avro Export",
+            registryPluginId: "com.example.AvroExport"
+        )
+
+        #expect(ExportFormatCatalog.installable(in: listed) == [parquet, avro])
+        #expect(ExportFormatCatalog.notInstalled(installedFormatIds: ["parquet"], manifest: listed) == [avro])
     }
 }