If CuteFTP (specifically its Transfer Engine) is working for extended periods of time, it may begin to consume large amounts of system resources (memory and hard drive space) due to log and queue requirements.
You can set CuteFTP to remove successful items from the queue to help alleviate this problem.
On the menu bar click Tools > Global Options > Transfer > Events.
Click Navigation Settings.
Select the Remove successfully finished items from the queue automatically check box.
Click OK.
Successful items will be removed even if tasks were run without the user interface open.
Each finished queue item takes about 500 bytes of memory until the Transfer Engine is closed.
You can also turn off logging to further improve resource management.
To disable logging
On the menu bar click Tools > Global Options > General > Logs.
Click Logs.
Clear the checkboxes for the logs you won't be needing.
Click OK.