Hi Pavla,
The license key (activation key) that you have directed me to in your above reply is the same one I used to install the software. The first time I tried it asked for Online/Offline activation. I pressed on Online and installation rolled back giving this pop up

Upon subsequent attempts for reinstallation, the following message is shown

CAN YOU PLEASE RESOLVE THIS.
Thanks & Regards,
Balabhadra Saketh