If it is different then potentially but would need to go in one at a time and also be noticeably different in features or design. Good luck
Try installing it via FTP – that error message is usually a hosting glitch and can be overcome using this method.
You need to login with the account which purchased the file and then download and check the documentation for the theme that will cover this.
Anything beyond this you can ask the author of the file, but again it will need to be using the buyer account so they can verify your purchase
On the whole you will always need permission form the authors and potentially extended licenses etc.
The best and safest way to do this is to ask the author individually per plugin (only the really big ones like Revolution and Layer slider have made these changes to simplify it that I am aware of).
Only assuming you have permission from he original author of the plugin.
As such a high % of themes on here use Royal, Layer and Revolution slider these three have altered their inclusion rules for themes e.g.
The author’s support forum for this theme is here http://herothemes.com/support/?envato_item_id=6217061
Support can take up to a week to reply. You can try tweeting them otherwise
That link is simply not good enough to be for sale here so you wont find anything just like it.
That said you could easily achieve this style using one of the many page builder and multi purpose sites (you could even find something nicer!)