Index: /trunk/src/org/openstreetmap/josm/actions/AddImageryLayerAction.java
===================================================================
--- /trunk/src/org/openstreetmap/josm/actions/AddImageryLayerAction.java	(revision 5465)
+++ /trunk/src/org/openstreetmap/josm/actions/AddImageryLayerAction.java	(revision 5466)
@@ -71,5 +71,5 @@
     protected void updateEnabledState() {
         // never enable blacklisted entries. Do not add same imagery layer twice (fix #2519)
-        if (info.isBlacklisted() || isLayerAlreadyPresent()) {
+        if (info.isBlacklisted() /*|| isLayerAlreadyPresent()*/) { // FIXME check disabled to allow several instances with different settings (see #7981)
             setEnabled(false);
         } else if (info.getImageryType() == ImageryType.TMS || info.getImageryType() == ImageryType.BING || info.getImageryType() == ImageryType.SCANEX) {