Fix game directory detect

Author: ManlyMarco

src/KKManager.Core/Functions/InstallDirectoryHelper.cs

@@ -144,7 +144,7 @@ public static bool IsValidGamePath(string path)
 
                 var anyDatas = Directory.GetDirectories(path)
                                         .Any(x => x.EndsWith("_Data", StringComparison.OrdinalIgnoreCase));
-                var abdataExist = File.Exists(Path.Combine(path, "abdata/abdata")) || File.Exists(Path.Combine(path, "abdata/sv_abdata"));
+                var abdataExist = File.Exists(Path.Combine(path, "abdata/abdata")) || File.Exists(Path.Combine(path, "abdata/sv_abdata")) || Directory.Exists(Path.Combine(path, "lib/chara"));
 
                 // todo use this to offer to install bepinex and other mods / run update wizzard
                 //var modsExist = Directory.Exists(Path.Combine(path, "bepinex")) && Directory.Exists(Path.Combine(path, "mods"));