James,
Have you received any error message while trying to reinstall AVG Antivirus for Mac? Refer this article: http://support.avg.com/SupportArticleView?urlname=How-to-download-and-install-AVG-AntiVirus-for-Mac to install it.
I have accidentally deleted AVG Antivirus with a app called app cleaner. It deletes its folder in the library and AVG Antivirus itself. Now I can't reinstall it.
James,
Have you received any error message while trying to reinstall AVG Antivirus for Mac? Refer this article: http://support.avg.com/SupportArticleView?urlname=How-to-download-and-install-AVG-AntiVirus-for-Mac to install it.