diff -ru extensions-orig/xExtension-TTRSS_API/extension.php extensions/xExtension-TTRSS_API/extension.php
--- extensions-orig/xExtension-TTRSS_API/extension.php	2016-12-15 10:24:17.000000000 +0000
+++ extensions/xExtension-TTRSS_API/extension.php	2017-02-18 13:06:59.640761922 +0000
@@ -9,7 +9,7 @@
 	public function install() {
 		$filename = 'ttrss.php';
 		$file_source = join_path($this->getPath(), $filename);
-		$path_destination = join_path(PUBLIC_PATH, 'api');
+		$path_destination = '/app/data/extensions';
 		$file_destination = join_path($path_destination, $filename);
 
 		if (!is_writable($path_destination)) {
@@ -35,7 +35,7 @@
 
 	public function uninstall() {
 		$filename = 'ttrss.php';
-		$file_destination = join_path(PUBLIC_PATH, 'api', $filename);
+		$file_destination = join_path('/app/data/extensions', $filename);
 
 		if (file_exists($file_destination) && !unlink($file_destination)) {
 			return 'API file cannot be removed';