As per the description above, you are not able to download the Adobe ExportPDF on your computer as it's asking to repurchase, Is that correct?
Please refer to the following KB doc and try the solution Why don't I get a download for Adobe Export PDF after I paid for it? Link: https://forums.adobe.com/thread/2453525
Feel free to update this discussion for any further assistance.
Thanks Anand for your quick and helpful response
Happy to help! Feel free to post us back if you have any further questions.