Troubles installing MEGA X

Hi,

I have got problems while trying to install the graphical software for Molecular Evolutionary Genetic Analysis (MEGA X) in Ubuntu/Debian system available at :https://www.megasoftware.net/ by downloading the corresponding package and running in the command line:

sudo dpkg -i megax_10.0.5-1_amd64.deb

Then, the following error message appeared:

arnau@arnau-W94-95-97JU:~/Escritorio$ sudo dpkg -i megax_10.0.5-1_amd64.deb
[sudo] password for arnau:
(Leyendo la base de datos ... 224997 ficheros o directorios instalados actualmente.)
Preparando para desempaquetar megax_10.0.5-1_amd64.deb ...
Desempaquetando megax (10.0.5) ...
dpkg: error al procesar el archivo megax_10.0.5-1_amd64.deb (--install):
intentando sobreescribir `/usr/local/share/man/man1/megacc.1', que esti tambii(C)n en el paquete megacc 7.0.25
Procesando disparadores para man-db (2.7.5-1) ...
Se encontraron errores al procesar:
megax_10.0.5-1_amd64.deb

Translating it:

dpkg: error while processing the archive megax_10.0.5-1_amd64.deb (--install):
trying to overwrite '/usr/local/share/man/man1/megacc.1' , that is also located in the package 7.0.25
Processing triggers for man-db (2.7.5-1) ....
Error while processing:
megax_10.0.5-1_amd64.deb

I have tried to remove (using rm) the archive megacc.1 located in /usr/local/share/man/man1 but I have insufficient permissions and I attempted to modify it with chmod but it was not possible (insufficient permissions error again).

Thank you very much for your help and sorry for the inconvenience.