Hey, thanks for your support of WriteRush!
For the web version (WriteRush v3.10 WEB.zip), you double-click 'index.html' to run it. This should open it in a browser tab. And it works on all platforms. You must first unzip it, though.
And fair warning, WriteRush should work on mobile, but the formatting isn't that great. I have it there as an option, but I haven't invested much time in doing it for mobile. That being said, you should be able to unzip the WriteRush file, and then double-click `index.html`. This will open WriteRush in a browser (not a dedicated Android app, that will probably come in a later update).
As for the white screen, I'm not sure why that would happen. Is the web version still working? And would you mind sending a screenshot so I can more accurately see what's happening? You should be able to use the web version until it works again.
Thanks, and I hope I can fix this for you!