You need to update software that supports .KMY file extension. The latest version supports current .KMY file format. You need to check .KMY file for viruses. Scan it with antivirus like Norton or Nod32.
KMyMoney cannot handle .KMY files if software is outdated. Latest KMyMoney version should support all formats of older versions.
.KMY extension was for KMyMoney app on Linux. KMyMoney Development Team made the program. Other programs also open .KMY files.
.KMY is Data File type designed by KMyMoney. 1326 related file types exist in Data File category. Main program for .KMY format is KMyMoney by KMyMoney Development Team.
Main issue is .KMY file incorrectly associates with programs. So incorrect program starts when opening .KMY file.
.KMY files contain financial data for KMyMoney app. Use KMyMoney to open .kmy files. Can probably export .kmy files to other formats.
KMyMoney