when i try to open a file i get this message:

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Skyline
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Failure opening \\Mac\Home\Documents\Lab\POSTDOC!\Experiments (HLG_000)\M_000-APEX mass spec experiments\ms_013-test on-bead\skyline peptide list\190311_HuganirR_SH_SemiTargetedList.sky.
The document format version 4.21 is newer than the version 4.2 supported by Skyline (64-bit) 4.2.0.19009.
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OK More Info
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System.Reflection.TargetInvocationException: There is an error in XML document (2, 2). ---> System.InvalidOperationException: There is an error in XML document (2, 2). ---> pwiz.Skyline.Util.VersionNewerException: The document format version 4.21 is newer than the version 4.2 supported by Skyline (64-bit) 4.2.0.19009.
   at pwiz.Skyline.Model.Serialization.DocumentReader.ReadXml(XmlReader reader) in C:\proj\skyline_4_2_x64\pwiz_tools\Skyline\Model\Serialization\DocumentReader.cs:line 530
   at pwiz.Skyline.Model.SrmDocument.ReadXml(XmlReader reader) in C:\proj\skyline_4_2_x64\pwiz_tools\Skyline\Model\SrmDocument.cs:line 2022
   at System.Xml.Serialization.XmlSerializationReader.ReadSerializable(IXmlSerializable serializable, Boolean wrappedAny)
   at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationReaderSrmDocument.Read1_srm_settings()
   --- End of inner exception stack trace ---
   at System.Xml.Serialization.XmlSerializer.Deserialize(XmlReader xmlReader, String encodingStyle, XmlDeserializationEvents events)
   at System.Xml.Serialization.XmlSerializer.Deserialize(TextReader textReader)
   at pwiz.Skyline.SkylineWindow.<>c__DisplayClass925_0.<OpenFile>b__0(IProgressMonitor progressMonitor) in C:\proj\skyline_4_2_x64\pwiz_tools\Skyline\SkylineFiles.cs:line 301
   at pwiz.Skyline.Util.ProgressWaitBroker.PerformWork(ILongWaitBroker broker) in C:\proj\skyline_4_2_x64\pwiz_tools\Skyline\Util\UtilUI.cs:line 123
   at pwiz.Skyline.Controls.LongWaitDlg.RunWork(Action`1 performWork) in C:\proj\skyline_4_2_x64\pwiz_tools\Skyline\Controls\LongWaitDlg.cs:line 232
   --- End of inner exception stack trace ---
   at pwiz.Skyline.Util.Helpers.WrapAndThrowException(Exception x) in C:\proj\skyline_4_2_x64\pwiz_tools\Skyline\Util\Util.cs:line 1854
   at pwiz.Skyline.Controls.LongWaitDlg.PerformWork(Control parent, Int32 delayMillis, Action`1 performWork) in C:\proj\skyline_4_2_x64\pwiz_tools\Skyline\Controls\LongWaitDlg.cs:line 180
   at pwiz.Skyline.Controls.LongWaitDlg.PerformWork(Control parent, Int32 delayMillis, Action`1 performWork) in C:\proj\skyline_4_2_x64\pwiz_tools\Skyline\Controls\LongWaitDlg.cs:line 132
   at pwiz.Skyline.SkylineWindow.OpenFile(String path, FormEx parentWindow) in C:\proj\skyline_4_2_x64\pwiz_tools\Skyline\SkylineFiles.cs:line 295
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