This probably has something to do with the game needing access in creating a folder on your computer so that it can save your games. Starting the game as an administrator and/or unblocking it from your anti-virus system should fix this.
V1.05b_Raft_Win64.exe caused an Access Violation (0xc0000005) in module V1.05b_Raft_Win64.exe at 0033:3fc6c070.
tried running it in admin mode and I also turned off my anti virus. It's still the same