Tvheadend

I create IPTV Automatic Network and add m3u file with links in format:

http://xxxxx.net:80/live?channelId=somenum&uid=somenum&deviceMac=00:1A:XX:XX:XX:XX

When I try scan some mux get FAIL, if I try edit MUX in URL field I have:

http://xxxxx.net:80/live?channelId=somenum&uid=somenum&deviceMac=00%3A1A%3AXX%3AXX%3AXX%3AXX

(%3A instead : (colon))

When remove %3A and change with :, MUX scan is OK.

Any idea how to change all muxes at once (or change m3u file) - my playlist have 700+ links and to slow change every MUX manualy.

Thank you