Genome size exceed int type

[Mozillian1]

Hello, I'm trying to use IGtools on the mouse genome and I got an error like:

sequence length -1571536154
java.lang.NegativeArraySizeException: -157153615
java.lang.NegativeArraySizeException: -157153615
        at igtools.common.sequence.B3LLSequence.<init>(B3LLSequence.java:39)
        at igtools.cli.util.FASTATo3bit.main(FASTATo3bit.java:33)

I believe that it was because the genome size exceeded the maximum value int type can hold.
I have read your publication 'Informational laws of genome structures.' and I found that you perform entropic analyses on mammals including mouse with large genomes. Would you kindly share your upgraded version for large genomes?
Thank you in advance.