Sorry for my late response.

I've removed the LookBack setting, but there's still a different date output. When I install Zorro 2.44 in the same directory as Zorro 2.40, it returns 'Date 200102...' when 'StartDate = 20200102', but when I install Zorro 2.46 beta under a new directory, it returns 'Date: 191231...' with the same script.

I thought, let's check the .t6 files and I've noticed that the 2.40 version for 'EURUSD_2020.t6' was 11,638 kb v.s. 11,465 kb for the Zorro 2.46 version (and probably Zorro 2.44 under a fresh directory as well), so I've replaced this one in my formal 2.40 directory (where's 2.44 is installed) by the newer (and smaller!) one, but there's still an output difference after restarting Zorro 2.44.