# Release Notes for Version 15.1.20221.0

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## Content

This set of release notes includes enhancements from the previous release and version details.

## Enhancements from the Previous Release

* The minimum target framework version has been changed from .NET 4.5.2 to .NET 4.6.2 because Microsoft has dropped support for older framework versions.
* The install location of the "Docs" folder has been changed. Refer to [Spread WPF Installed Files](/spreadnet/docs/latest/readme/installedfiles/installfilesWPF).

## File Versions

Spread WPF installs the following file versions on your system. See [Installed Files](/spreadnet/docs/latest/readme/installedfiles/installfilesWPF) for the exact location of these files.

| **File** | **Version** |
| ---- | ------- |
| GrapeCity.SpreadSheet.Design.dll | 15.45.20221.0 |
| GrapeCity.SpreadSheet.VSDesign.dll | 15.45.20221.0 |
| GrapeCity.WPF.CalcEngine.dll | 15.45.20221.0 |
| GrapeCity.WPF.Excel.dll | 15.45.20221.0 |
| GrapeCity.WPF.PDF.dll | 15.45.20221.0 |
| GrapeCity.WPF.SpreadSheet.Data.dll | 15.45.20221.0 |
| GrapeCity.WPF.SpreadSheet.UI.dll | 15.45.20221.0 |
| GrapeCity.WPF.SpreadSheet.UI.VisualStudio.Design.dll | 15.45.20221.0 |
| ICSharpCode.WPF.SharpZipLib.dll | 0.86.0.518 |