Editing a logotype template is quite a simple process that is not even professionally handled. You can create a completely unique styled logo inherent to your brand.
Next, you will need an understanding of Adobe Illustrator Properties Panel. Check out Adobe Help Center if you have not previously worked with Illustrator.
Brand Name changing
Press V to activate Selection Tool. Double Click on Brand Name layer to edit it.
Start typing your brand name and press Esc button when you finish editing.
Brand Name styling
Before you start, install the necessary fonts. The list of fonts and links to download them you can find in the font-info.txt file.
Press V to activate the Selection Tool. Click once on Brand Name layer to select it.
Set new font family, font size, font color or other font options in the Properties Panel. Go to Window -> Properties to Show/Hide the Properties Panel.
Brand Mark Setting
Press V to activate Selection Tool. Click once on the Brand Mark layers.
Change the Color, Dimensions or Position layer in the Properties Panel. Go to Window -> Properties to Show/Hide the Properties Panel.
If you want to change the shape form, press A to activate Direct Selection Tool.
Click on empty canvas space when you finish editing.
After completing all the above steps, you can already see the final result. However, you may need to slightly change the position of the layers. Make sure that all aligned properly and press Ctrl+S (Windows) or ⌘+S (Mac) to save changes.