Hi Praeveen,
Thanks for reaching out with your question about BoldGrid Post and Page Builder for WordPress!
To switch to the standard WordPress editor just navigate to any page or post from your dashboard and if Post and Page Builder or Classic Editor are active, the editor menu will be in the upper right hand corner, as shown below:
If you need to switch back to the Post and Page Builder editor, click the three dots in the upper right (outlined in red below) to show more. Other editor options will appear in the Plugins section:
I hope this helps. Please reach back out if you have any other questions for us.