Free for Windows 10 and 11, 64-bit. Download WhatsBackUp-Setup-1.2.1.exe below (237 MB) and run it — no admin password, nothing to install first. Existing installations update themselves on the next restart.
Windows will probably say "Windows protected your PC", because the installer isn't signed with a paid certificate. Click More info, then Run anyway.
Fixed in 1.2.1
AI sorting works with Google Gemini again. Gemini's 2.5 models reason before they answer, and the reasoning is spent from the same token allowance as the reply — so a request for a short structured answer was thought past the limit and came back with nothing parseable. Test connection reported that the model ignored the requested format and could not see images; both were the same cause, and neither was what it looked like. Thinking is switched off for these calls now, since labelling a photograph against a fixed schema has nothing to reason about. The connection test also judges a model on 300 tokens rather than 64, which was too mean a budget to judge one by.
Everything below arrived in 1.2.0, earlier the same week: videos that play in the gallery and full screen, a settings file that can no longer be lost, storage trouble reported as storage trouble, a log that rotates on Windows, and conversation paging that stopped hiding messages.