Aye. This seems totally outrageous to me. Where's the logic in not implementing this feature? Looks like we need to do them one-by-one. Yeay.
Depends on what you want to use it for. In many cases you do not need to convert it - plenty of services and applications can work with FIT files directly, so if your app does not accept FIT files, you…
Depends on what you want to use it for. In many cases you do not need to convert it - plenty of services and applications can work with FIT files directly, so if your app does not accept FIT files, you can try finding an alternative one. You can also export the activites in the GPX or TCX format drirectly from Garmin Connect idividually or using a bulk script (as recommended in the other thread you posted to). Or you can google up a FIT / GPX converter