License Retrieval

I have tried to activate my copy of PDF Expert with the promo code/license code I received and I've never been able to do so.

I think I purchased the app bundle awhile ago. How do I get the apps back without having to repurchase?

I am in the trial period for PDF Expert 2 on my iMac running Sierra. If I purchase this product is the license for 1 machine only or can I use it on additional machines, like my MacBook?

I purchased a license to install PDF Expert and i downloaded and installed it to my MAC desktop. Can i install it at my MacBook Pro laptop as well? Will I be charged again? What is the process? Simply download the free trial and enter the same license number? Is there a limit on the downloads? (have 2 laptops).

I have PDF expert already installed on my iPad, and I want to install it on my new Macbook Pro, but it seems I have to pay for it again on MacOS.

Can you please clarify if I need to pay for it again on MacOS?

My apple id is the same on both devices.

If I purchase the application for my Mac, can I also use it on my iPhone and iPad without and additional purchase? Or, do I also have to purchase the iOS version separately?

I've purchased a full license on App store, but I had a trial version, and now it keeps on asking me for the license number, which I did not receive when buying. Can you please help me with this. After installing, it keeps on saying this is a trial version.

Do I have to buy the program twice (once for my iPad and one for my Mac) or can I just put in a license key? And if so where can I find it because I bought it in the Apple iPad store. Do I need two licences? One for MAC and one for iPhone?

I just got a license for Mac and it gives me activation error.
Order number: READDLExxxxxx-xxxx-xxxxx

When I launch the app it tells me I have 7 days to buy it, even though I have already purchased it. How do I make the app recognize the purchase?