It appear a second main window. After close this window the application close. 

15:04:33: Geany INFO : Using TCP port number 45937 for IPC 15:04:33: Geany INFO : Geany 1.37.1, German_Germany.1252 15:04:33: Geany INFO : GTK 2.24.32, GLib 2.66.2 15:04:33: Geany INFO : OS: Windows 10 1909 15:04:33: Geany INFO : System data dir: C:\Program Files (x86)\Geany\data 15:04:33: Geany INFO : User config dir: C:\Users\c900\AppData\Roaming\geany 15:04:33: Geany INFO : System plugin path: C:\Program Files (x86)\Geany\lib\geany 15:04:34: Geany INFO : Added filetype Arduino (63). 15:04:34: Geany INFO : Added filetype Clojure (64). 15:04:34: Geany INFO : Added filetype CUDA (65). 15:04:34: Geany INFO : Added filetype Cython (66). 15:04:34: Geany INFO : Added filetype Genie (67). 15:04:34: Geany INFO : Added filetype Graphviz (68). 15:04:34: Geany INFO : Added filetype Groovy (69). 15:04:34: Geany INFO : Added filetype JSON (70). 15:04:34: Geany INFO : Added filetype Kotlin (71). 15:04:34: Geany INFO : Added filetype Nim (72). 15:04:34: Geany INFO : Added filetype Scala (73). 15:04:34: Geany INFO : Added filetype Swift (74). 15:04:34: Geany INFO : Added filetype TypeScript (75). 15:04:34: GLib-GIO DEBUG : _g_io_module_get_default: Found default implementation winhttp (GWinHttpVfs) for ‘gio-vfs’ 15:04:34: Geany INFO : Loaded: C:\Program Files (x86)\Geany\lib\geany\filebrowser.dll (Dateibrowser) 15:04:36: Geany INFO : unknown : None (UTF-8)