diff --git a/Plain Craft Launcher 2/Modules/Base/ModValidate.vb b/Plain Craft Launcher 2/Modules/Base/ModValidate.vb
index b7f818b..eedc20e 100644
--- a/Plain Craft Launcher 2/Modules/Base/ModValidate.vb	
+++ b/Plain Craft Launcher 2/Modules/Base/ModValidate.vb	
@@ -214,6 +214,7 @@ Public Class ValidateFolderName
         On Error Resume Next
         PathIgnore = New DirectoryInfo(Path).EnumerateDirectories
     End Sub
+
     Public Overrides Function Validate(Str As String) As String
         Try
             '检查是否为空
@@ -233,6 +234,8 @@ Public Class ValidateFolderName
             '检查特殊字符串
             Dim InvalidStrCheck As String = New ValidateExceptSame({"CON", "PRN", "AUX", "CLOCK$", "NUL", "COM0", "COM1", "COM2", "COM3", "COM4", "COM5", "COM6", "COM7", "COM8", "COM9", "LPT0", "LPT1", "LPT2", "LPT3", "LPT4", "LPT5", "LPT6", "LPT7", "LPT8", "LPT9"}, "文件夹名不可为 %！", True).Validate(Str)
             If Not InvalidStrCheck = "" Then Return InvalidStrCheck
+            '检查波浪号 (issue #4505)
+            If Str.Contains("~") Then Return "文件名不能包含波浪号！"
             '检查文件夹重名
             Dim Arr As New List(Of String)
             If PathIgnore IsNot Nothing Then
@@ -286,6 +289,8 @@ Public Class ValidateFileName
             '检查特殊字符串
             Dim InvalidStrCheck As String = New ValidateExceptSame({"CON", "PRN", "AUX", "CLOCK$", "NUL", "COM0", "COM1", "COM2", "COM3", "COM4", "COM5", "COM6", "COM7", "COM8", "COM9", "LPT0", "LPT1", "LPT2", "LPT3", "LPT4", "LPT5", "LPT6", "LPT7", "LPT8", "LPT9"}, "文件名不可为 %！", True).Validate(Str)
             If Not InvalidStrCheck = "" Then Return InvalidStrCheck
+            '检查波浪号 (issue #4505)
+            If Str.Contains("~") Then Return "文件名不能包含波浪号！"
             '检查文件重名
             If ParentFolder IsNot Nothing Then
                 Dim DirInfo As New DirectoryInfo(ParentFolder)
@@ -351,7 +356,9 @@ Fin:
             '检查特殊字符串
             Dim InvalidStrCheck As String = New ValidateExceptSame({"CON", "PRN", "AUX", "CLOCK$", "NUL", "COM0", "COM1", "COM2", "COM3", "COM4", "COM5", "COM6", "COM7", "COM8", "COM9", "LPT0", "LPT1", "LPT2", "LPT3", "LPT4", "LPT5", "LPT6", "LPT7", "LPT8", "LPT9"}, "文件夹名不可为 %！").Validate(SubStr)
             If Not InvalidStrCheck = "" Then Return InvalidStrCheck
+            '检查波浪号 (issue #4505)
+            If Str.Contains("~") Then Return "文件夹名不能包含波浪号！"
         Next
         Return ""
     End Function
-End Class
+End Class
\ No newline at end of file