i cant believe the btc in my armory wallet is stolen.

I had armory in mac then after the code upgrade i had to install on windows. i had 1btc in mac armory wallet, now after the windows installation of armory it says zero balance and the latest transaction (which i didnt make) with ID: 1688b19b6052e9ceffb042f099ef106b1d27b88fd6dd181b10ae97726657a4c0

where is security? can you please explain this?

my mac old wallet still shows 1btc in wallet because it is outdated, then how is it possible that 'I' made that transaction. Armory is supposed to be safe.