I have the same problem with Reaper crashing when I try to load Helix Native, and I too want to know that there is a fix before I take out my credit card. I run Reaper 5.981/x64 and Helix Native 1.80, on a fairly recent Lenovo notebook. Everything seems to work fine when I have just installed it, but when I switch off and then start things up again Reaper crashes when trying to load Helix Native.