It presents itself primarily when running the Curse Voice client since that is what is maintaining the multiple instances of minecraft to be passed to the launcher. Since the update performed a couple of hours ago, whenever an instance of Minecraft is passed to the launcher, the launcher seems to be only looking in the Appdata directory for the launcher_profiles.json file. Everything worked perfectly on Minecraft Launcher 1.6.37, something must have been changed in 1.6.38 to make the Curse Voice client unable to send the instance of Minecraft to the launcher. I have already reported this to the team at Curse Voice, if this change was intentional and they are the ones that need to fix this issue please ignore. Otherwise, it would be greatly appreciated if this could be fixed as soon as possible. Thank you for your help with this matter.