Cust gets Eztrends message: "The "Format of the file 'AxInterop.iPlotLibrary'. Is invalid." while trying to plot one of his flights in the latest Eztrends - Version 2, Build 6. The downloaded version from your website is Version 1, Build 3373. XP laptop – fully updated.
No problem with data file with EzTrends 1.0.3371. If you have used Eztrends 2.0.6 before and then go back to 1.0.3371, it may cause the issue because 2.0.6 uses .NET framework 2.0 and 1.0.3371 uses .NET framework 1.1.
Please make sure you uninstalled EzTrends from Control Panel first, check the installation directory (usually "C:EzTrends") to see if there are any interop files, if there are, delete the interop files, then go to internet to Microsoft Updates to update your Windows XP, restart your computer and then install EzTrends 1.0.3371.