diff --git a/regina.1.md b/regina.1.md
index 2e88d86..77eb34e 100644
--- a/regina.1.md
+++ b/regina.1.md
@@ -36,7 +36,8 @@ Regina supports several data visualization configurations and can generate an ad
 
 ## Dependencies
 - **nginx**: You need a nginx webserver that outputs the access log in the `combined` format, which is the default
-- **Python 3.10**
+- **sqlite >= 3.37**
+- **Python >= 3.10**
 - **Python/matplotlib**
 
 ## Installation
@@ -52,7 +53,7 @@ If you also want to install the man-page and the zsh completion script:
 ```shell
     sudo cp regina.1.man /usr/share/man/man1/regina.1
     sudo gzip /usr/share/man/man1/regina.1
-    sudo cp regina/package-data/_regina.compdef.zsh /usr/share/zsh/site-functions/_regina
+    sudo cp regina/package-data/_regina.compdef.zsh /usr/local/share/zsh/site-functions/_regina
     sudo chmod +x /usr/share/zsh/site-functions/_regina
 ```
 
@@ -113,7 +114,6 @@ In our example, `/www` will look like this:
     |-- resources
     |   |-- image.jpg
     |-- index.html
-    
 ```
 
 ### Automation
@@ -138,14 +138,41 @@ This will make you the owner of the log 9 minutes after midnight, just before `r
 You can acquire such a database for free at [ip2location.com](https://lite.ip2location.com/) (and probably some other sites as well!).
 After creating create an account you can download several different databases in different formats.  
 For `regina`, download the `IP-COUNTRY-REGION-CITY` for IPv4 as *csv*. 
-By default, `regina` only tells you which country a user is from.
-To see the individual cities for countries, append the two-letter country code to the `get_cities_for_contries` option in the `data-collection` section in the config file.
-After that, oad the GeoIP-data into your database:
+
+To configure regina to use the GeoIP database, edit `get_visitor_location` and `get_cities_for_contries` in section `data-collection`.  
+By default, `regina` only tells you which country a user is from. 
+Append the two-letter country codes for countries you are interested in to the `get_cities_for_contries` option.  
+After that, add the GeoIP-data into your database:
 ```
     regina --config regina.conf --update-geoip path-to-csv
 ```
 Depending on how many countries you specified, this might take a long time. You can delete the `csv` afterwards.
 
+
+# CUSTOMIZATION
+## Generated html
+The generated file does not need to be an html. The template can be any text file.  
+`regina` will only replace certain words starting with a `%`.
+You can see all supported variables and their values by running `--visualize` with `debug_level = 1`.
+
+## Data export
+If you want to further process the data generated by regina, you can export the data by setting the `data_out_dir` in the `data-export` section.
+The data can be exported as `csv` or `pkl`.  
+If you choose `pkl` as filetype, all rankings will be exported as python type `list[tuple[int, str]]`.
+
+## Database
+You can of course work directly with the database, as long as it is not altered.
+Editing, adding or deleting entries might make the database incompatible with regina, so only do that if you know what you are doing.
+Just querying entries will be fine though.
+
+# TROUBLESHOOTING
+## General
+If you are having problems, try setting the `debug_level` in section `debug` of the configuration file to a non-zero value.
+
+## sqlite3.OperationalError: near "STRICT": syntax error
+Your sqlite3 version is probably too old. Check with `sqlite3 --version`. `regina` requires 3.37 or higher.  
+Hotfix: Remove all `STRICT`s from `<python-dir>/site-packages/regina/sql/create_db.sql`.
+
 # CHANGELOG
 ## 1.1
 - Improved database format: 
diff --git a/regina/data_visualization/visualize.py b/regina/data_visualization/visualize.py
index 6bc3974..4db1c31 100644
--- a/regina/data_visualization/visualize.py
+++ b/regina/data_visualization/visualize.py
@@ -417,7 +417,7 @@ def visualize(db: Database):
 
 
     html_variables_str = dict_str(html_variables).replace('\n', '\n\t')
-    pdebug(f"visualize: html_variables:\n\t{html_variables_str}", lvl=2)
+    pdebug(f"visualize: html_variables:\n\t{html_variables_str}", lvl=1)
 
     template_html: str|None = settings["html-generation"]["template_html"]
     html_out_path: str|None = settings["html-generation"]["html_out_path"]
diff --git a/regina/utility/globals.py b/regina/utility/globals.py
index 18bd941..b205ee7 100644
--- a/regina/utility/globals.py
+++ b/regina/utility/globals.py
@@ -270,7 +270,7 @@ Both are optional: you can provide, none or both
     ])
 cfg.add_section("route-groups", desc="Group certain routes together using by matching them with a regular expression.\nThe route's request count will be added to all matching groups and the route will be removed from the ranking.", entries=[
     comment("Home = /|(/home.html)|(/index.html)"),
-    comment(r"Images = .*\.((png)|(jpg)|(jpeg)|(gif)|(webp)|(svg))"),
+    comment(r"Images = .*\.((png)|(jpe?g)|(gif)|(webp)|(svg)|(ico))"),
     comment(r"Resources = /resources/.*"),
     ])