I think it is better to replace usearch (32 bit) by other tools if it is just used for sorting contig by length, when I run the preprocessing step of metawibele, it throws an error because my fasta file is too big( the limitation of 32 bit usearch). I have to manually change the code related usearch and replace it with another tool.
Thanks for your feedback! That sounds a good suggestion. I added it to our list for the future releases.