Office click-to-run command line options using officeC2Rclient.exe - is this officially supported?

I recall reading somewhere that Microsoft was no longer supporting the officeC2Rclient.exe command line options for updating/changing channels/changing versions for Office 365 ProPlus. Does anyone know whether or not the officeC2Rclient.exe is still supported? 

It has stopped working in scripts we had written incorporating it and I don't want to use it if Microsoft is not supporting and/or developing it further. 

If no longer supported, it will be a loss... was very useful.