renamed file (.jxs --> .ctb) cannot be opened

[Pussy123a]

Hello,
if I open a .jxs file (Uniformation GKTwo) then I get this message:

System.IO.InvalidDataException: End of Central Directory record could not be found.
at System.IO.Compression.ZipArchive.ReadEndOfCentralDirectory()
at System.IO.Compression.ZipArchive..ctor(Stream stream, ZipArchiveMode mode, Boolean leaveOpen, Encoding entryNameEncoding)
at System.IO.Compression.ZipFile.Open(String archiveFileName, ZipArchiveMode mode, Encoding entryNameEncoding)
at System.IO.Compression.ZipFile.Open(String archiveFileName, ZipArchiveMode mode)
at UVtools.Core.FileFormats.JXSFile.DecodeInternally(OperationProgress progress) in UVtools.Core\FileFormats\JXSFile.cs:line 419
at UVtools.Core.FileFormats.FileFormat.Decode(String fileFullPath, FileDecodeType fileDecodeType, OperationProgress progress) in UVtools.Core\FileFormats\FileFormat.cs:line 4187
at UVtools.UI.MainWindow.<>c__DisplayClass97_0.b__2() in UVtools.UI\MainWindow.axaml.cs:line 1432

The solution should be to rename .jxs to .ctb. But now I get this message:

System.UnauthorizedAccessException: Access to the path is denied.
at System.IO.FileSystem.MoveFile(String sourceFullPath, String destFullPath, Boolean overwrite)
at System.IO.File.Move(String sourceFileName, String destFileName, Boolean overwrite)
at UVtools.Core.FileFormats.FileFormat.Encode(String fileFullPath, OperationProgress progress) in UVtools.Core\FileFormats\FileFormat.cs:line 4133
at UVtools.Core.FileFormats.FileFormat.SaveAs(String filePath, OperationProgress progress) in UVtools.Core\FileFormats\FileFormat.cs:line 5678
at UVtools.Core.FileFormats.FileFormat.Decode(String fileFullPath, FileDecodeType fileDecodeType, OperationProgress progress) in UVtools.Core\FileFormats\FileFormat.cs:line 4221
at UVtools.UI.MainWindow.<>c__DisplayClass97_0.b__2() in UVtools.UI\MainWindow.axaml.cs:line 1432

What does this message mean?

UVtools 4.3.0 X64
Operative system: Microsoft Windows 11
Printer: Uniformation GKTwo
Slicer: Uniformation Slicer

[sn4k3]

Try to run UVtools as Administrator