First of all, you need to download the theme installable file from your account that purchased item, go to your Dashboard > Downloads Tab
Install theme via WordPress
Step 1: Navigate to Appearance > Themes
Step 2: Click Add New, then click Upload Theme > Choose File
Step 3: Navigate to the .zip file on your computer, then click Install Now
Step 4: When the installation complete, click Activate. You will be redirected to Themes page with Induxpro activated.
Install theme via FTP
Step 1: Unzip zip file package – the zip package is inside Induxpro files folder you have downloaded from ThemeForest Induxpro.
Step 2: Connect to your FTP server and navigate to the folder where your WordPress is installed.
Step 3: Go to wp-content/themes/ and upload theme folder (the path will look like this: wp-content/themes/induxpro.
Step 4: Open WordPress admin panel (navigate through the web-browser to the folder where you have installed the WordPress e.g www.yourdomain.com/wp-admin/) and go Appearance > Themeson admin sidebar. Activate Induxpro.