Fix #1453 (error unrar binary not found)

README.md

@@ -54,9 +54,7 @@ Optionally, to enable on-the-fly conversion from one ebook format to another whe
 
 [Download and install](https://calibre-ebook.com/download) the Calibre desktop program for your platform and enter the folder including program name (normally /opt/calibre/ebook-convert, or C:\Program Files\calibre\ebook-convert.exe) in the field "calibre's converter tool" on the setup page.
 
-\*** DEPRECATED \*** Support will be removed in future releases
-
-[Download](http://www.amazon.com/gp/feature.html?docId=1000765211) Amazon's KindleGen tool for your platform and place the binary named `kindlegen` in the `vendor` folder.
+[Download](https://github.com/geek1011/kepubify/releases/tag/v3.1.2) Kepubify tool for your platform and place the binary starting with `kepubify` in Linux: `\opt\kepubify` Windows: `C:\Program Files\kepubify`.
 
 ## Docker Images
 

cps/admin.py

@@ -683,6 +683,7 @@ def _configuration_update_helper():
     reboot_required |= reboot
     # Rarfile Content configuration
     _config_string(to_save, "config_rarfile_location")
+    if "config_rarfile_location" in to_save:
         unrar_status = helper.check_unrar(config.config_rarfile_location)
         if unrar_status:
             return _configuration_result(unrar_status, gdriveError)

cps/helper.py

@@ -778,7 +778,7 @@ def get_download_link(book_id, book_format, client):
     book_format = book_format.split(".")[0]
     book = calibre_db.get_filtered_book(book_id)
     if book:
-        data1 = data = calibre_db.get_book_format(book.id, book_format.upper())
+        data1 = calibre_db.get_book_format(book.id, book_format.upper())
     else:
         abort(404)
     if data1: