Each of these tutorials has a point by point procedure in text with a video that demonstrates that procedure.
Convert LSD to Lat/Lng
Click the Convert tab.
Click the DLS tab.
Enter the grid coordinate with the drop down lists.
Click the Convert button.
You can also use this form to enter the grid coordinate by pasting into the text box using Ctrl-V. The text box takes precedence over the drop down list. You can select other output coordinates using the check boxes. By default DD and DLS are selected.
After you have converted a grid coordinate you can click the Clear button to clear all entries in the form and go back to defaults.