Remove Currency Selection from invoice, quote and recurring as this will be determined by your company currency in settings, the payment is what matters as this is where it will be converted

check_login.php

@@ -45,6 +45,7 @@
 	$row = mysqli_fetch_array($sql);
 
 	$session_company_name = $row['company_name'];
+	$session_company_currency = $row['company_currency'];
 
 	include("get_settings.php");