Running DSLStats V.5.9.5 (pre-release) on Win. 8.1 64 Bit to Huaewei HG612, vDSL2 connection.
With reference to the issue reported by "renloup", dated 27/05/17, not sure if on same program revision, I have been experiencing similar issues with respect to auto-saving and taking snapshots of text pages.
Stat's (summary) page:
Snapshot (camera symbol) does work on demand.
Does not auto-save when selected.
Average errors page:
Snapshot will not work, produces error in log "unable to save average errors text" on every snapshot request.
Also in "show values for" window, jumps from "today" to earliest listed entry date.
Does not auto-save when selected.
I appreciate that this is a very similar, probably identical, report to that of "renloup" on 27/05/17, however, perhaps this additional information regarding my experiences on my system may help with verification & possible diagnosis.