Remove old release archives

Clean up versioned zip files from v0.1.1 through v0.2.5 to reduce repository size and clutter. Release artifacts should be managed through proper release channels rather than committed to the repository.

.gitignore

@@ -1,3 +1,5 @@
 .idea
 .DS_Store
 .vscode
+*.zip
+__pycache__/

README.md

@@ -14,7 +14,7 @@ See [crosspoint_reader/README.md](crosspoint_reader/README.md) for protocol deta
 
 ## Installation
 
-Download the latest release from the [releases page](https://github.com/crosspoint-reader/calibre-plugins/releases), then in Calibre: **Preferences > Plugins > Load plugin from file**.
+Download the latest release ZIP from the [releases page](https://github.com/crosspoint-reader/calibre-plugins/releases). Do not open or extract the ZIP; install the ZIP file itself in Calibre via **Preferences > Advanced > Plugins > Load plugin from file**.
 
 ## Development
 

crosspoint_reader/README.md

@@ -112,8 +112,8 @@ identity, then caches it. Most setups never need it — leave it off unless some
 library books still aren't marked.
 
 Install:
-1. Download the latest release from the [releases page](https://github.com/crosspoint-reader/calibre-plugins/releases) (or zip the contents of this directory).
-2. In Calibre: Preferences > Plugins > Load plugin from file.
+1. Download the latest release ZIP from the [releases page](https://github.com/crosspoint-reader/calibre-plugins/releases) (or zip the contents of this directory). Do not open or extract the ZIP; install the ZIP file itself.
+2. In Calibre: Preferences > Advanced > Plugins > Load plugin from file.
 3. The device should appear in Calibre once it is discoverable on the network.
 
 No configuration needed. The plugin auto-discovers the device via UDP and