Version 1.2.4 of Stay is now available and can be downloaded here.
General Changes
Stay is now compatible with OS X 10.10 Yosemite.
Stay 1.2.4 requires a minimum of OS X 10.9. Stay 1.2.3 remains available for users running OS X 10.8.
The “Edit Stored Windows…” windows are resizable.
New preferences and status bar icons.
Better progress feedback during long store and restore operations.
Reliability improvements for Safari, Google Chrome, Firefox, Terminal, iTerm 2, iTunes, Messages, Reminders, and Tweetbot.
Bug Fixes:
Worked around a bug in OS X that caused windows to disappear when repositioned by Stay under certain circumstances.
Fixed a bug that could cause a hidden app to be incorrectly unhidden when restoring windows with multiple Desktops enabled.
Fixed a bug that prevented the use of window linking with windows not on the main screen.
Stay 1.2.4 will only run on versions of OS X from 10.9 (Mavericks) onwards. Stay 1.2.3 remains available for use on OS X 10.8 and can be downloaded here.