The build 294.12 is available in the Product Owner's Lounge forum. This beta version addresses some issues in the builds 294.10 and 294.11, especially performance issues in the editor with big applications.
This version is on Steam too. As usual if you want to install this beta version you need to suscribe to betas in the properties of Fusion 2.5 in the Steam client, using the code provided in the Clickteam Fusion 2.5 Beta Code thread in the Steam forum.
This build is a release candidate, i.e. if no specific important issue is reported this will be the new official version of the build 294.
For the ones who didn't see it yet, here is a document that highlights the new features of the build 294.
If any question or issue specific to this build, please post it here, thanks!
In case of problem you can reinstall any other version (no need to uninstall first, just reinstall the patch of the build you want to reinstall).
PS: the CF 2.5 patch updates all the installed exporters, as well as the 2.5+ DLC, you do not need to reinstall them.