Thank you Peldi for your answer and tips.
I am using this version
Version: 1.8.7 - 06/29/2010 16:41 11:28 (Air)
Adobe AIR Player Version: LNX 10,1,53,64
and I am not using vertical labels, I have tried switch to system fonts but it seems not so significant for performance (at least I don't see so much defference).
So seems for now it is not so convenient for me to use this program actively because this tool should save time for mocking. It should have rich set of components, good usability, allow reuse mocks and FAST. But now for me the last point is not true.
Will track your change log and changes in Adobe AIR for Linux...