Drafysight 18 worked well for over a year but started crashing on start up after Microchip PIC IDE software was loaded on computer. Gives "must now close" dialog box immediately after startup.

Tried repair option with new download of Draftsight 18, still crashes, then uninstalled Microchip IDE and re ran repair, still crashes, then uninstalled Draftsight 18 and reninstalled from new download file, no change still crashes.

Has anyone any suggestions on how to fix?