diff --git a/.travis.yml b/.travis.yml
index 82e8fd42..d3056da8 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -43,8 +43,12 @@ matrix:
             - llvm-toolchain-precise 
 
 before_install:
+  # donwload nana-demo first
+  # we are in:  'user'/nana/
   - cd ..
-  - git clone --depth=1 --branch=hotfix https://github.com/qPCR4vir/nana-demo.git nana-demo
+  # we are in:   'user'/
+  - git clone --depth=1 --branch=master https://github.com/qPCR4vir/nana-demo.git nana-demo
+  # now we have 'user'/nana-demo, 'user'/nana/  and we are in: 'user'/
   - export PATH="$HOME/bin:$PATH"
   - wget --no-check-certificate --no-clobber -O /tmp/tools/cmake https://cmake.org/files/v3.12/cmake-3.12.0-rc3-Linux-x86_64.sh || true
   - chmod -R +x /tmp/tools
@@ -53,22 +57,24 @@ install:
   - /tmp/tools/cmake --prefix="$HOME" --exclude-subdir
 
 before_script :
-  # we have:  qPCR4vir/nana/../nana-demo and  now we are in: qPCR4vir/nana/  our executable tests will access: ../nana-demo/Examples/*.bmp etc.(need to be in parallel with nana-demo/Examples)
-  #- cd ../nana-demo
-  - mkdir  demo-build
+  - mkdir demo-build
   - cd demo-build
+  # now we have 'user'/nana-demo, 'user'/nana/ , 'user'/demo-build/ and we are in: 'user'/demo-build/
 
 services:
-  - # travis don't have a physical monitor. We need to install an emulator: https://docs.travis-ci.com/user/gui-and-headless-browsers/
+  # travis don't have a physical monitor. We need to install an emulator:
+  # https://docs.travis-ci.com/user/gui-and-headless-browsers/
   - xvfb
 
 script:
   - cmake -G"Unix Makefiles" ../nana-demo -DCMAKE_INSTALL_PREFIX=.. -DNANA_CMAKE_ENABLE_JPEG=ON -DNANA_CMAKE_FIND_BOOST_FILESYSTEM=OFF -DNANA_CMAKE_AUTOMATIC_GUI_TESTING=ON -DNANA_CMAKE_INSTALL=OFF
   - make install
+  # we have installed in 'user'/ ('user'/demo-build/..), and cmake created 'user'/nana-test/
   # todo: separate resources from sources (a directory for images)
   - ls
+  # we were still in: 'user'/demo-build/
   - cd ../nana-test/bin
-  - ls
+  - ls -lh
   - ./a_group_impl
   - ./animate-bmp
   - ./audio_player
@@ -107,22 +113,21 @@ script:
   - ./menu_debug  
   #- ./modal_form     # https://travis-ci.org/qPCR4vir/nana/jobs/140250744#L1736
   #- ./MontiHall             # https://travis-ci.org/qPCR4vir/nana/jobs/140238537#L1775
-  #- ./helloworld_demo           # https://travis-ci.org/qPCR4vir/nana/jobs/140238537#L1786
+  - ./helloworld_demo
+  # https://travis-ci.org/qPCR4vir/nana/jobs/140238537#L1786
   #- ./notepad      # https://travis-ci.org/qPCR4vir/nana/jobs/140238537#L1799
-  - ./menu_debug  
-  - ./menu_popuper  
-  #- ./modal_form       # https://travis-ci.org/qPCR4vir/nana/jobs/140238537#L1846
+  - ./menu_popuper
   #- ./widget_show2    # https://travis-ci.org/qPCR4vir/nana/jobs/140245437#L1730
   #- ./widget_show           # https://travis-ci.org/qPCR4vir/nana/jobs/140245437#L1740
   - ./place_login  
   - ./png  
   #- ./screen       # https://travis-ci.org/qPCR4vir/nana/jobs/140238537#L1909
-  - ./stretch_image  
-  #- ./threading     # https://travis-ci.org/qPCR4vir/nana/jobs/140245437#L1826   ?
-  #- ./thread-pool  # https://travis-ci.org/qPCR4vir/nana/jobs/140247564#L1782
+  - ./stretch_image
+  - ./textbox_line_number
+  - ./threading     # https://travis-ci.org/qPCR4vir/nana/jobs/140245437#L1826   ?
+  - ./thread-pool  # https://travis-ci.org/qPCR4vir/nana/jobs/140247564#L1782
   - ./various_events  
   #- ./window-dragger    # https://travis-ci.org/qPCR4vir/nana/jobs/140245438#L1820
   - ./windows-subclassing   
-  - ./textbox_line_number