Today I stopped Zorro 1.26 (running Z12 on a demo FXCM-EUR account) and when I re-started it again I got a "Trade not found error" and a crash. Then I replaced .trd with the .bak and rename it, but then some trades were not resumed by Zorro.
As it happened on a demo account that I use to compare results with other account then it's not a really bad thing, however maybe support might want to take a look in order to find any bug..