Currently typing this on a train on my phone.... You can delete the task from the task menu. The username and password entered when setting up the task is your Windows username and password. On the modem tab you need to make sure the IP address is correct and maybe enter the username and password for the modem.
Depending on which version of windows your running you may need to manually run the exe programs in the script folder and tell Windows/AV it's OK to run them in future.
The three you need to run manually are Hg612 Run, HG612 Stats and HG612 Current Stats.
Hope that helps.