https://drive.google.com/drive/folders/16EEDgjwVZ6hPA0sLzatQ_s301HRS6M-F?usp=sharing
After downloading unzip the archive, and load the ".json" file from the "Genomes > Load from File" menu in the genome folder. For GRCh37 download the "hg19.zip" file.
I'm not sure what you could have downloaded from NCBI, but if you have created a custom genome you can make it work locally by following the steps indicated earlier (instructions here).