Update INSTALL-1.4.0.md

```
| Q                 | A
| ----------------- | ---
| Bug fix?          | no
| New feature?      | no
| BC breaks?        | no
| Deprecations?     | no
| Tests pass?       | yes
| Fixed tickets     | zikula#2277
| Refs tickets      | -
| License           | MIT
| Doc PR            | -
| Changelog updated | [yes/no]
```

INSTALL-1.4.0.md

@@ -61,7 +61,7 @@ or `.tgz` file) to your server and then `unzip` them there. (This is faster and
 files and directories to your webroot (typically `public_html` or `httpdocs`).
 
 Remark for Windows/FTP users: Take care about copying all files. If there are some files you are not able to transfer 
-to the server check if your longest path length is longer than Windows/FTP-Software allows.
+to the server check if your longest path length is longer than Windows/FTP-Software allows (more than 256 characters).
 
 
 ###Set file permissions (Critical)