When I use Valentina in the Mac environment (LiveCode development), I get the log files as expected in the Applications/vlogs folder.
I recently installed Parallels Desktop on my Mac so that I could test in a Windows environment. (I also have a V4REV license for Windows.) However, when I test my application in the Windows environment, nothing is written to a log file. The only vlogs folder that I could find in the Windows environment is at AppData\Roaming\Valentina Studio. However, that folder is empty and no log files are created there.