Update "updating ip how to"

I think that in this “how to” you have to add to not overwrite:

/invoiceplane/assets/default/css/custom.css
/invoiceplane/assets/default/css/custom-pdf.css

Or (IMHO better) delete that files from the installation package and create them through the installation script only if needed!

p.s. I think the same thing about /application/config/database.php.

Last Update: 05.07.2016

this is the only link you should not override plus backup all your files
/application/config/database.php.

then run on your brouser http://yourdomain.com/subdiredory/index.php/setup
or how ever you url is

about this I was thinking on a solution like delete that file from the installation package and create it through the installation script only if needed!