maplevmcv356.exe is part of Maple Virtual Midi Cable Setup. Maple Virtual Midi Cable is a free midi drivers for Windows. This file is safe.
Maple virtual Midi is out of date, not work properly on a 64bit system , ReWire is more popular choice. ReWire is a software protocol developed by Propellerhead which lets you synchronize two DAWs and stream audio and MIDI from one (the ReWire Device) to the other (the ReWire Host) on the same computer. non-virtual MIDI and LoopBe1 is also a good choice. LoopBe1 allows 1 MIDI port (16 MIDI Channels) only and free for 1 computer personal copy.