Forerunner 255 Music: GPS saved locations editing on my MS Windows PC

Hi

I would like to edit the GPS saved locations on my device and I have some difficulties doing this.

I did the following:

1 - Copy the FIT file Lctns.fit (located in my PC\Forerunner 255 Music\Internal Storage\GARMIN\Location) to my desktop

2 - Edit the Lctns.fit file mainly changing the date par the location name

3 - Correct the FIT file CRC as indicated

4 - Copy back the FIT file Lctns.fit to my device

However when trying to read the saved locations on my device I still have the original information, i.e. changes were not taken into account.

Any advice, any help on this way of doing?

Many thanks.