C:\Documents and Settings\All Users\Application Data\MicroFour\ConnectionData

There will be two files here that need to be deleted: AppKeys.Dat and Connections.Dat.  Once these files are removed, go back into Visual Studio and you will be required to provide the connection information again.  But this will get you going.

XmlException
 Invalid character in the given encoding. Line 1, position 1.

Source     : System.Xml

Stack Trace:
   at System.Xml.XmlTextReaderImpl.Throw(Exception e)
   at System.Xml.XmlTextReaderImpl.Throw(String res, String arg)
   at System.Xml.XmlTextReaderImpl.InvalidCharRecovery(Int32& bytesCount, Int32& charsCount)
   at System.Xml.XmlTextReaderImpl.GetChars(Int32 maxCharsCount)
   at System.Xml.XmlTextReaderImpl.ReadData()
   at System.Xml.XmlTextReaderImpl.SwitchEncoding(Encoding newEncoding)
   at System.Xml.XmlTextReaderImpl.ParseXmlDeclaration(Boolean isTextDecl)
   at System.Xml.XmlTextReaderImpl.Read()
   at System.Xml.XmlTextReader.Read()
   at System.Xml.XmlReader.MoveToContent()
   at System.Data.DataSet.ReadXml(XmlReader reader, XmlReadMode mode, Boolean denyResolving)
   at System.Data.DataSet.ReadXml(String fileName, XmlReadMode mode)
   at MicroFour.StrataFrame.Xml.XmlBasics.OpenXmlFile(String CurrentVersion, String TableName, String PathAndFileName, List`1 ColumnStructure)
   at MicroFour.StrataFrame.Xml.XmlBasics.OpenXmlFile(String Version, String TableName, String PathAndFileName, List`1 ColumnStructure, Boolean DecryptFile)
   at MicroFour.StrataFrame.Data.BusinessObjects.DbeApplicationData.FillAll()
   at MicroFour.StrataFrame.Data.ConnectionManager.SetConnections()
   at MicroFour.StrataFrame.Data.AppMain.SetDataSources()
   at MicroFour.StrataFrame.Application.StrataFrameApplication.Raise_SetDataSources()
   at MicroFour.StrataFrame.Application.StrataFrameApplication.RunApplication()
   at MicroFour.StrataFrame.Data.AppMain.Main()