Please try this fix, it just add some style properties to the dialog.
src/src/resources/env_settings.xrc | 1 +
1 file changed, 1 insertion(+)
diff --git a/src/src/resources/env_settings.xrc b/src/src/resources/env_settings.xrc
index 597ce97..67bd03c 100644
--- a/src/src/resources/env_settings.xrc
+++ b/src/src/resources/env_settings.xrc
@@ -3,6 +3,7 @@
<object class="wxScrollingDialog" name="dlgEnvironmentSettings">
<title>Environment settings</title>
<centered>1</centered>
+ <style>wxDEFAULT_DIALOG_STYLE|wxRESIZE_BORDER|wxMAXIMIZE_BOX</style>
<object class="wxBoxSizer">
<orient>wxVERTICAL</orient>
<object class="sizeritem">