One of the features of EasyRoll is that it has a utility called Discover that allows your PC to go and find any modules that may be physically connected to you network regardless of the I.P. address settings of your PC or the I.P. address settings of the modules

Clicking the Discover button will cause the list box to populate with all the modules in all Subnets that your PC can see out on the network
The drop-down box at the top of the list box lets you filter the list by Subnet
To change the IP Address, Subnet Mask, etc. of a module, double click it from the list and its data can be modified
Once you have edited the data, click the Set button and the changes are sent to the module