Hello

I'm new here and in bioiformatics. I'm aligning bacterial genomes to analyze and compare the core genome. I'm using PGAP-X at Windows. The software needs *.fna and *.ptt files to run, but when I go to retrieve the genomes (in this case, plasmid sequences), I can't download it in *.fna format, it only can be downloaded in *.fasta format. I know that both formats are the same, but this program didn't recognize *.fasta format. I tried to change the file extension to *.fna, but the format didn't change. The same happens with the *.ptt files, because NCBI post that this kind of files were replaced for something like "feature_tables", that have different formats.

Somebody could help me?

Thanks