diff -r b963af4aac40 -r 9452eccfc0f0 ui/common/properties.c
--- a/ui/common/properties.c	Fri Sep 12 17:38:39 2025 +0200
+++ b/ui/common/properties.c	Sat Sep 13 19:52:18 2025 +0200
@@ -128,6 +128,7 @@
 
 void uic_load_app_properties() {
     application_properties = cxHashMapCreate(cxDefaultAllocator, CX_STORE_POINTERS, 128);
+    application_properties->collection.simple_destructor = free;
     
     if(!ui_appname()) {
         // applications without name cannot load app properties
@@ -202,7 +203,11 @@
 }
 
 void ui_set_property(const char *name, const char *value) {
-    cxMapPut(application_properties, name, (char*)value);
+    if(value) {
+        cxMapRemove(application_properties, name);
+    } else {
+        cxMapPut(application_properties, name, strdup(value));
+    }
 }
 
 const char* ui_set_default_property(const char *name, const char *value) {