@balihr There are some errors in the file you submitted - do you have a github repo I could submit PRs to? I'd also like to put this plugin into a new download (specifically for 1.5.8) once it is fixed.

PHP Parse error: syntax error, unexpected identifier "s", expecting "]" in ./YOUR_ADMIN/includes/languages/dutch/lang.plugin_manager.php on line 27

Parse error: syntax error, unexpected identifier "s", expecting "]" in ./YOUR_ADMIN/includes/languages/dutch/lang.plugin_manager.php on line 27
Errors parsing ./YOUR_ADMIN/includes/languages/dutch/lang.plugin_manager.php
PHP Parse error: syntax error, unexpected token "=>", expecting ")" in ./YOUR_ADMIN/includes/languages/dutch/lang.developers_tool_kit.php on line 24

Parse error: syntax error, unexpected token "=>", expecting ")" in ./YOUR_ADMIN/includes/languages/dutch/lang.developers_tool_kit.php on line 24
Errors parsing ./YOUR_ADMIN/includes/languages/dutch/lang.developers_tool_kit.php
PHP Parse error: syntax error, unexpected identifier "s", expecting "]" in ./YOUR_ADMIN/includes/languages/dutch/lang.sqlpatch.php on line 4

Parse error: syntax error, unexpected identifier "s", expecting "]" in ./YOUR_ADMIN/includes/languages/dutch/lang.sqlpatch.php on line 4
Errors parsing ./YOUR_ADMIN/includes/languages/dutch/lang.sqlpatch.php
PHP Parse error: syntax error, unexpected token "=>", expecting ")" in ./includes/languages/dutch/lang.gv_send.php on line 9

Parse error: syntax error, unexpected token "=>", expecting ")" in ./includes/languages/dutch/lang.gv_send.php on line 9
Errors parsing ./includes/languages/dutch/lang.gv_send.php
PHP Parse error: syntax error, unexpected token "=>", expecting ")" in ./includes/languages/dutch/lang.gv_redeem.php on line 6

Parse error: syntax error, unexpected token "=>", expecting ")" in ./includes/languages/dutch/lang.gv_redeem.php on line 6
Errors parsing ./includes/languages/dutch/lang.gv_redeem.php
PHP Parse error: syntax error, unexpected token "=>", expecting ")" in ./includes/languages/dutch/lang.popup_cvv_help.php on line 8

Parse error: syntax error, unexpected token "=>", expecting ")" in ./includes/languages/dutch/lang.popup_cvv_help.php on line 8
Errors parsing ./includes/languages/dutch/lang.popup_cvv_help.php