I wish that were true - but even for show-all-data with one data-point (height, for example), it still fails to load. And every graph is empty, even ones with

I wish that were true - but even for show-all-data with one data-point (height, for example), it still fails to load. And every graph is empty, even ones with manually entered data. If I choose edit->clear all for a data type, it still doesn't recover.