Where can I change the setting where the "first log file" saves?

I set it in dropbox, but the file grows so big that it will fill up my account every couple of days. Couldn't find out where to change this in settings or forum. Thanks!

what log file?

the activity log

this log file gets written continuously without limiting it's size.

How can I change the path where the log file saves?

You define it when you choose that option from popup menu. To change it you have to disable and enable log to file again.

Where is the option? I can't find it.

scorched

scorched  Right click the log output window, and you'll see it. Just disable it first. When you enable it you will be asked for the location once more.