This file will upgrade BusTools/ARINC v2.61 or greater to version 3.90. Supports 64-bit Microsoft Windows 11, 32-bit/64-bit Windows 7, Server 2008 R2, 8, Server 2012 R1, 8.1, Server 2012 R2, and 10, and 32-bit Windows XP. You must have v2.61, v2.70, v2.80, v2.90, v3.00, v3.20, v3.30, v3.40, v3.50, v3.60, v3.70 or v3.80 currently installed to use this upgrade. If you have an earlier version please contact abaco.support@ametek.com for upgrade instructions.