Just tried it and alas, it no worky :-( - perhaps a small issue, but please don't spend time on trying to fix it if not.
I selected a StrategyTestersmall.htm file, this worked ok and as expected c. 23Mb
I then selected StrategyTester.htm, @ c. 42Mb - after a 3-4 minute wait (upload ??) the screen responded that the file selected is still the Small file and showed all stats for that file only - no errors
I then closed the browser and tried again but without loading the small file first:
After 3-4 minutes wait, the screen responded with no file selected - no information available, no statistics