Upgrading should now work.

.SRCINFO

@@ -1,7 +1,7 @@
 pkgbase = teamviewer
 	pkgdesc = All-In-One Software for Remote Support and Online Meetings
 	pkgver = 11.0.52520
-	pkgrel = 1.2
+	pkgrel = 1.3
 	url = http://www.teamviewer.com
 	install = teamviewer.install
 	arch = i686

PKGBUILD

@@ -1,11 +1,9 @@
 # Maintainer: Yakir Sitbon <kingyes1 at gmail dot com>
-# Contributor: Alucryd <alucryd at gmail dot com>
-# Contributor: Stas S <whats_up at tut dot by>
-# Contributor: Hilinus <itahilinus at hotmail dot it>
+# Contributor: Alex Taber <aft dot pokemon at gmail dot com>
 
 pkgname=teamviewer
 pkgver=11.0.52520
-pkgrel=1.1
+pkgrel=2
 pkgdesc="All-In-One Software for Remote Support and Online Meetings"
 arch=('i686' 'x86_64')
 url="http://www.teamviewer.com"
@@ -33,6 +31,16 @@ package() {
   cd "${srcdir}"
 
 # Install
+  if [ -f /opt/teamviewer/logfiles ]
+    then
+      rm opt/teamviewer/logfiles
+  fi
+
+  if [ -f /opt/teamviewer/config ]
+    then
+      rm opt/teamviewer/config
+  fi
+
   cp -dr --no-preserve=ownership {etc,opt,usr,var} "${pkgdir}"/
 
 # Additional files