Recommend-Access-to-Previous-Builds

We cannot support reverting to a previous build for a while. Given the speed of reaction to issues, only the actual build can basically be supported. That while eventually becomes a long while and here's when those issues hard to grasp start to appear:

https://www.wealth-lab.com/Discussion/Signal-does-not-open-a-position-for-negative-prices-6859
https://www.wealth-lab.com/Discussion/How-to-reduce-Loading-Data-time-6849
https://www.wealth-lab.com/Discussion/Why-my-strategy-won-t-take-trades-in-certain-stock-6654

Morevoer, many extensions require a minimum WL7 build now due to new features and introduced breaking changes so check this out too:

https://www.wealth-lab.com/Discussion/ChartPatterns-not-showing-after-installation-6992

To solve your minor frustration, just keep a brief history of downloaded installers somewhere (Dropbox, your Download folder, backup drive etc.) for rescue but use them wisely.