If a test file name contains "{" or "}" - the file can not be copy/pasted

The exception received is:

[03-01 09:40:36,Telerik.TestStudio.Desktop.exe(10680:1),TestStudio] FileSystemProvider.CopyTest() : EXCEPTION! (see below)
     Outer Exception Type: System.FormatException
     Message: Input string was not in a correct format.
     HRESULT: 0x80131537 (Official ID (if app.) = COR_E_FORMAT, Error Bit = FAILED, Facility = FACILITY_URT, Code = 5431)
     Call Stack:
          at System.Text.StringBuilder.AppendFormatHelper(IFormatProvider provider, String format, ParamsArray args)
          at System.String.FormatHelper(IFormatProvider provider, String format, ParamsArray args)
          at ArtOfTest.WebAii.Design.ProjectModel.Providers.FileSystemProvider.GetNextFilename(String pattern)
          at ArtOfTest.WebAii.Design.ProjectModel.Providers.FileSystemProvider.NextAvailableFilename(String path)
          at ArtOfTest.WebAii.Design.ProjectModel.Providers.FileSystemProvider.CopyTest(LightFolder newParentFolder, LightTest testToCopy, String newName)