Launcher workDir argument no longer accepts relative directory.

NOTE: 2.1.14948 is missing from the Affects Versions list
Previously I could launch the launcher using the following arguments from my directory:

C:\Minecraft>MinecraftLauncher.exe --workDir . 

Now I have to specify the full path for it to accept the path:

C:\Minecraft>MinecraftLauncher.exe --workDir C:\Minecraft\