Upgraded AR Price plugin fails to load

I was using AR Price Lite and created my maximum 4 tables. To create more, I purchased the premium version. Downloaded it. It fails when I try to add this download as it says the plugin already exists.
I do not want to delete the Lite version in order to add the Premium version in case it removes the 4 tables already created. What can I do?


In case of premium version upgrade you can check if they have any one click upgrade button in wp-admin => plugins. If have use that one.

You will not be bale to install premium version through wp-admin => plugins upload because you already have the same plugin. In that case you can use ftp to replace the exist files of the plugin.

Also you can contact plugin author and request them to suggest you the best way.