Fix old Program plugin constructor issue

Author: Jack251970

Flow.Launcher.Infrastructure/Storage/BinaryStorage.cs

@@ -1,4 +1,5 @@
-using System.IO;
+using System;
+using System.IO;
 using System.Threading.Tasks;
 using Flow.Launcher.Infrastructure.Logger;
 using Flow.Launcher.Infrastructure.UserSettings;
@@ -40,6 +41,16 @@ public BinaryStorage(string filename)
             FilePath = Path.Combine(DirectoryPath, $"{filename}{FileSuffix}");
         }
 
+        // Let the old Program plugin get this constructor
+        [Obsolete("This constructor is obsolete. Use BinaryStorage(string filename) instead.")]
+        public BinaryStorage(string filename, string directoryPath = null!)
+        {
+            directoryPath ??= DataLocation.CacheDirectory;
+            FilesFolders.ValidateDirectory(directoryPath);
+
+            FilePath = Path.Combine(directoryPath, $"{filename}{FileSuffix}");
+        }
+
         public async ValueTask<T> TryLoadAsync(T defaultData)
         {
             if (Data != null) return Data;