I received a layer package (lpkx) from a client. Finding out I couldn't open it in ArcMap led me to discover that this is a newer version of the software (ArcGIS Pro).
I managed to install that and license it. But once I opened it in ArcGIS Pro I quickly found out that the functionality to add proportional piecharts is not (yet) implemented in Pro, so I can't do the things I need to do.
Now it appears that the entire file from the client is useless, as I can't open it in ArcMap either.
Are there any possible fixes?