Hi!
From last log:
17:02:49:556   19e0   Check and remove old log files...
17:02:49:556   19e0   args: -epool eu1.ethermine.org:4444 -ewal home1 -epsw x -dpool stratum+tcp://xvg.antminepool.com:9008 -dwal xxx -dpsw c=XVGB -dcoin blake2s -allpools 1 -logsmaxsize 100 -mclock 2050 -mvddc 850 -cclock 1175 -cvddc 850 -tt 57 -dcri 45 -minspeed -29

and see in directory
06.04.2018  14:41        55 887 213 1522721763_log.txt
10.04.2018  11:17        56 237 700 1523020175_log.txt
11.04.2018  17:32        21 746 898 1523348833_log.txt
12.04.2018  14:35        14 905 598 1523457529_log.txt
12.04.2018  17:02          1 774 777 1523533258_log.txt

Why old files after restart not deleted?