I didn't realize you were on a different computer now.
As Carl mentioned above, you'll need to either physically access your old PC or have a backup to retrieve your downloads and customs. Those aren't "stored" with PD, so even if you installed the older PD on your new system, none of your personilzed content would be there.
Newer PD versions DO save those items to the cloud and will automatically restore your content when you do a new install on another machine, but in your case, you'll need transfer them manually.
Do you still have the old PC (or a backup)? We can show you where all the files are stored and help you get them loaded on your Win10 machine.
YouTube/optodata
DS365 | Win11 Pro | Ryzen 9 3950X | RTX 4070 Ti | 32GB RAM | 10TB SSDs | 5K+4K HDR monitors
Canon Vixia GX10 (4K 60p) | HF G30 (HD 60p) | Yi Action+ 4K | 360Fly 4K 360°