Before adding a new google account into the software follow these simple steps to prepare the account:
1) Log into mail.google.com for the account and respond to any authentication/verifications requested.
2) Open any security email from google and respond to it by clicking Yes it was me.
3) While still logged in open another tab in your browser and go to https://sites.google.com and if you don't already have any sites listed click on the plus sign under the create new site heading to create one blank site. Name it anything then click publish.
Once you've completed the above steps you're ready to add the account into GSitesBuilder.
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Right-Click the button below and choose Save As to download the zip file then unzip the file . You'll find the GSitesBuilder installation file inside the folder once it has been unzipped. (not sure how to unzip see here for steps how to unzip a file ) Double click the installation file to install the software and once installed find it in your start menu and start it. When it opens the first time you'll be prompted to enter your purchase email to activate it.