That's a setting for Spriter playback in the game, not in Spriter. If you want to play the animation once in Spriter without looping, right click the standard play-button instead of left clicking it.
When I click the Current Time field above the timeline to jump to a frame, the numbers highlight as they should. But if I start typing in a frame number to jump to, instead of changing the numbers, the software takes the inputs as shortcut keys and I usually end up locking sprites, hitting play, and a bunch of other stuff before realizing the numbers are not changing. I can't edit the numbers until I double-click on the numbers again (un-highlight and re-highlight). It does this every time I go to click on the Current Frame field. This is pretty annoying. I am on Windows 7 Pro. Spriter 10.
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