diff --git a/coordinator/configure.lua b/coordinator/configure.lua
index fb29193..100b079 100644
--- a/coordinator/configure.lua
+++ b/coordinator/configure.lua
@@ -959,7 +959,10 @@ local function config_view(display)
     end
 
     local function save_and_continue()
-        for k, v in pairs(tmp_cfg) do settings.set(k, v) end
+        for _, field in ipairs(fields) do
+            local k, v = field[1], tmp_cfg[field[1]]
+            if v == nil then settings.unset(k) else settings.set(k, v) end
+        end
 
         if settings.save("/coordinator.settings") then
             load_settings(settings_cfg, true)
diff --git a/coordinator/startup.lua b/coordinator/startup.lua
index 62d1511..cb7d92b 100644
--- a/coordinator/startup.lua
+++ b/coordinator/startup.lua
@@ -19,7 +19,7 @@ local renderer    = require("coordinator.renderer")
 local sounder     = require("coordinator.sounder")
 local threads     = require("coordinator.threads")
 
-local COORDINATOR_VERSION = "v1.5.3"
+local COORDINATOR_VERSION = "v1.5.5"
 
 local CHUNK_LOAD_DELAY_S = 30.0
 
diff --git a/pocket/configure.lua b/pocket/configure.lua
index 0002383..783cf9a 100644
--- a/pocket/configure.lua
+++ b/pocket/configure.lua
@@ -379,7 +379,10 @@ local function config_view(display)
     end
 
     local function save_and_continue()
-        for k, v in pairs(tmp_cfg) do settings.set(k, v) end
+        for _, field in ipairs(fields) do
+            local k, v = field[1], tmp_cfg[field[1]]
+            if v == nil then settings.unset(k) else settings.set(k, v) end
+        end
 
         if settings.save("/pocket.settings") then
             load_settings(settings_cfg, true)
diff --git a/pocket/startup.lua b/pocket/startup.lua
index d0394c0..ed3f36f 100644
--- a/pocket/startup.lua
+++ b/pocket/startup.lua
@@ -20,7 +20,7 @@ local pocket    = require("pocket.pocket")
 local renderer  = require("pocket.renderer")
 local threads   = require("pocket.threads")
 
-local POCKET_VERSION = "v0.11.4-alpha"
+local POCKET_VERSION = "v0.11.6-alpha"
 
 local println = util.println
 local println_ts = util.println_ts
diff --git a/reactor-plc/config/system.lua b/reactor-plc/config/system.lua
index 46f5afc..1486170 100644
--- a/reactor-plc/config/system.lua
+++ b/reactor-plc/config/system.lua
@@ -450,7 +450,10 @@ function system.create(tool_ctl, main_pane, cfg_sys, divs, style, exit)
     end
 
     local function save_and_continue()
-        for k, v in pairs(tmp_cfg) do settings.set(k, v) end
+        for _, field in ipairs(fields) do
+            local k, v = field[1], tmp_cfg[field[1]]
+            if v == nil then settings.unset(k) else settings.set(k, v) end
+        end
 
         if settings.save("/reactor-plc.settings") then
             load_settings(settings_cfg, true)
diff --git a/reactor-plc/startup.lua b/reactor-plc/startup.lua
index 1bc863a..b83f9df 100644
--- a/reactor-plc/startup.lua
+++ b/reactor-plc/startup.lua
@@ -18,7 +18,7 @@ local plc       = require("reactor-plc.plc")
 local renderer  = require("reactor-plc.renderer")
 local threads   = require("reactor-plc.threads")
 
-local R_PLC_VERSION = "v1.8.3"
+local R_PLC_VERSION = "v1.8.5"
 
 local println = util.println
 local println_ts = util.println_ts
diff --git a/rtu/configure.lua b/rtu/configure.lua
index b5cceeb..943c248 100644
--- a/rtu/configure.lua
+++ b/rtu/configure.lua
@@ -650,8 +650,11 @@ local function config_view(display)
 
     ---@param exclude_conns boolean? true to exclude saving peripheral/redstone connections
     local function save_and_continue(exclude_conns)
-        for k, v in pairs(tmp_cfg) do
-            if not (exclude_conns and (k == "Peripherals" or k == "Redstone")) then settings.set(k, v) end
+        for _, field in ipairs(fields) do
+            local k, v = field[1], tmp_cfg[field[1]]
+            if not (exclude_conns and (k == "Peripherals" or k == "Redstone")) then
+                if v == nil then settings.unset(k) else settings.set(k, v) end
+            end
         end
 
         -- always set these if missing
diff --git a/rtu/startup.lua b/rtu/startup.lua
index 5f53bee..cbaada7 100644
--- a/rtu/startup.lua
+++ b/rtu/startup.lua
@@ -31,7 +31,7 @@ local sna_rtu      = require("rtu.dev.sna_rtu")
 local sps_rtu      = require("rtu.dev.sps_rtu")
 local turbinev_rtu = require("rtu.dev.turbinev_rtu")
 
-local RTU_VERSION = "v1.10.3"
+local RTU_VERSION = "v1.10.5"
 
 local RTU_UNIT_TYPE = types.RTU_UNIT_TYPE
 local RTU_UNIT_HW_STATE = databus.RTU_UNIT_HW_STATE
diff --git a/supervisor/configure.lua b/supervisor/configure.lua
index 982550a..59be74f 100644
--- a/supervisor/configure.lua
+++ b/supervisor/configure.lua
@@ -907,7 +907,10 @@ local function config_view(display)
     end
 
     local function save_and_continue()
-        for k, v in pairs(tmp_cfg) do settings.set(k, v) end
+        for _, field in ipairs(fields) do
+            local k, v = field[1], tmp_cfg[field[1]]
+            if v == nil then settings.unset(k) else settings.set(k, v) end
+        end
 
         if settings.save("/supervisor.settings") then
             load_settings(settings_cfg, true)