diff --git a/ch2/neuron/README.md b/ch2/neuron/README.md
index 3d384a00..c4d7fbd3 100644
--- a/ch2/neuron/README.md
+++ b/ch2/neuron/README.md
@@ -1,4 +1,4 @@
-Back to [All Sims](https://github.com/CompCogNeuro/sims) (also for general info and executable downloads)
+*Back to [All Sims](https://github.com/CompCogNeuro/sims)*
 
 # Introduction
 
diff --git a/ch2/neuron/neuron.go b/ch2/neuron/neuron.go
index 40ca6b45..1d0248de 100644
--- a/ch2/neuron/neuron.go
+++ b/ch2/neuron/neuron.go
@@ -456,11 +456,11 @@ func (ss *Sim) ConfigGUI() {
 			},
 		})
 		ss.GUI.AddToolbarItem(p, egui.ToolbarItem{Label: "README",
-			Icon:    "file-markdown",
+			Icon:    icons.FileMarkdown,
 			Tooltip: "Opens your browser on the README file that contains instructions for how to run this model.",
 			Active:  egui.ActiveAlways,
 			Func: func() {
-				core.TheApp.OpenURL("https://github.com/emer/leabra/blob/master/examples/neuron/README.md")
+				core.TheApp.OpenURL("https://github.com/CompCogNeuro/sims/blob/main/ch2/neuron/README.md")
 			},
 		})
 	})
diff --git a/go.mod b/go.mod
index 3776a688..81b0cd92 100644
--- a/go.mod
+++ b/go.mod
@@ -3,9 +3,9 @@ module github.com/CompCogNeuro/sims/v2
 go 1.22
 
 require (
-	cogentcore.org/core v0.3.2
-	github.com/emer/emergent/v2 v2.0.0-dev0.1.0.0.20240817184051-b75266eed90a
-	github.com/emer/leabra/v2 v2.0.0-20240817184441-8630076d69e4
+	cogentcore.org/core v0.3.3-0.20240819085555-796f3621ccd2
+	github.com/emer/emergent/v2 v2.0.0-dev0.1.0.0.20240819090259-66be6cb0fc29
+	github.com/emer/leabra/v2 v2.0.0-20240819090431-2df44cab16df
 )
 
 require (
diff --git a/go.sum b/go.sum
index 7b7c4f82..cbb42f65 100644
--- a/go.sum
+++ b/go.sum
@@ -1,5 +1,5 @@
-cogentcore.org/core v0.3.2 h1:oj2WbnM5HaJsfOTJOo42Ij7eNETab3ntcHFCoa72KNs=
-cogentcore.org/core v0.3.2/go.mod h1:dg3uRsPcd8S1ZYvRD2TztCtjopRkrB5V/lbl54xsQd4=
+cogentcore.org/core v0.3.3-0.20240819085555-796f3621ccd2 h1:DwtxTMkpLp3BdnRwqDPRfm8ZqVNUwe4qsEnW3npqvmU=
+cogentcore.org/core v0.3.3-0.20240819085555-796f3621ccd2/go.mod h1:dg3uRsPcd8S1ZYvRD2TztCtjopRkrB5V/lbl54xsQd4=
 github.com/Bios-Marcel/wastebasket v0.0.4-0.20240213135800-f26f1ae0a7c4 h1:6lx9xzJAhdjq0LvVfbITeC3IH9Fzvo1aBahyPu2FuG8=
 github.com/Bios-Marcel/wastebasket v0.0.4-0.20240213135800-f26f1ae0a7c4/go.mod h1:FChzXi1izqzdPb6BiNZmcZLGyTYiT61iGx9Rxx9GNeI=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
@@ -36,10 +36,10 @@ github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc h1:U9qPSI2PIWSS1
 github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/dlclark/regexp2 v1.11.0 h1:G/nrcoOa7ZXlpoa/91N3X7mM3r8eIlMBBJZvsz/mxKI=
 github.com/dlclark/regexp2 v1.11.0/go.mod h1:DHkYz0B9wPfa6wondMfaivmHpzrQ3v9q8cnmRbL6yW8=
-github.com/emer/emergent/v2 v2.0.0-dev0.1.0.0.20240817184051-b75266eed90a h1:RMk0HZbfVnSYfv7PW0kksvEQyU+KUq8wOpq7Ny+u9YI=
-github.com/emer/emergent/v2 v2.0.0-dev0.1.0.0.20240817184051-b75266eed90a/go.mod h1:d7I/V6OMyMeibKt9VA0lHgaPCGvq3Gen6tvZE6KJNu8=
-github.com/emer/leabra/v2 v2.0.0-20240817184441-8630076d69e4 h1:oA5+UWp25uBv3/1jZNAbwokeNwRQo34CSNFL+SQrgBg=
-github.com/emer/leabra/v2 v2.0.0-20240817184441-8630076d69e4/go.mod h1:ct7Ao78lGNkDJUWgBwnXcif2PMGe0bg22WcQJQ7J+ms=
+github.com/emer/emergent/v2 v2.0.0-dev0.1.0.0.20240819090259-66be6cb0fc29 h1:DUIid0p3GHxFlVPs0M63MV0xaUYnthzPE9cqtpPJy0Y=
+github.com/emer/emergent/v2 v2.0.0-dev0.1.0.0.20240819090259-66be6cb0fc29/go.mod h1:LVJBLdkzshgWjCCw/cOr4b1gOTRMPtOczWd+XysxIac=
+github.com/emer/leabra/v2 v2.0.0-20240819090431-2df44cab16df h1:CuR/NVlUfUG/C1BRCh83qGBjVzuGdslePvJK6EUxU9I=
+github.com/emer/leabra/v2 v2.0.0-20240819090431-2df44cab16df/go.mod h1:tMGZFx0Bjw0XqAWzZfCsV9UUdm34/uKXKEm98ZmxzW0=
 github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
 github.com/fsnotify/fsnotify v1.7.0 h1:8JEhPFa5W2WU7YfeZzPNqzMP6Lwt7L2715Ggo0nosvA=
 github.com/fsnotify/fsnotify v1.7.0/go.mod h1:40Bi/Hjc2AVfZrqy+aj+yEI+/bRxZnMJyTJwOpGvigM=