Hi, the package structure of your comic is not correct as you have a main directory: lechat/contents/code/main.js lechat/icon.png lechat/metadata.desktop while it should be: contents/code/main.js icon.png metadata.desktop This leads to problems when uninstalling. To make a correct package you can do the following (suposing that you are in the lechat directory): zip -ur ../lechat.comic . If you have some files you do not want to include like "~" files you could use the following command for example zip -u ../lechat.comic icon.png metadata.desktop contents/code/main.js The same applies to the La Bande Pas Dessinee comic. Cheers matthias PS.: Nice to have some French comics too. :)