Remove file associations only if qbt is associated. Fixes issue #307.

src/windows/installer-translations/english.nsi

@@ -41,3 +41,7 @@ LangString remove_firewallinfo ${LANG_ENGLISH} "Removing Windows Firewall rule"
 LangString remove_cache ${LANG_ENGLISH} "Remove torrents and cached data"
 ;LangString uninst_warning ${LANG_ENGLISH} "qBittorrent is running. Please close the application before uninstalling."
 LangString uninst_warning ${LANG_ENGLISH} "qBittorrent is running. Please close the application before uninstalling."
+;LangString uninst_tor_warn ${LANG_ENGLISH} "Not removing .torrent association. It is associated with:"
+LangString uninst_tor_warn ${LANG_ENGLISH} "Not removing .torrent association. It is associated with:"
+;LangString uninst_mag_warn ${LANG_ENGLISH} "Not removing magnet association. It is associated with:"
+LangString uninst_mag_warn ${LANG_ENGLISH} "Not removing magnet association. It is associated with:"

src/windows/uninstaller.nsi

@@ -49,9 +49,25 @@ SectionEnd
 
 Section "un.$(remove_associations)" ;"un.Remove file associations"
   SectionIn RO
+  ReadRegStr $0 HKEY_CLASSES_ROOT ".torrent" ""
+  StrCmp $0 "qBittorrent" torrent 0
+  DetailPrint "$(uninst_tor_warn) $0"
+  Goto qbt
+  torrent:
   DeleteRegKey HKEY_CLASSES_ROOT ".torrent"
+  
+  qbt:
   DeleteRegKey HKEY_CLASSES_ROOT "qBittorrent"  
+  
+  ReadRegStr $0 HKEY_CLASSES_ROOT "Magnet\shell\open\command" ""
+  StrCmp $0 '"$INSTDIR\qbittorrent.exe" "%1"' magnet 0
+  DetailPrint "$(uninst_mag_warn) $0"
+  Goto done
+  
+  magnet:
   DeleteRegKey HKEY_CLASSES_ROOT "Magnet"
+  
+  done:
   System::Call 'Shell32::SHChangeNotify(i ${SHCNE_ASSOCCHANGED}, i ${SHCNF_IDLIST}, i 0, i 0)'
 SectionEnd