D-Premier firmware 5.7.3

[ogs]

I remember that I didn't like any of the 6.x very much. The 5.7.3 is quite special, but I also used 7.1.3 (and liked it) for a while before upgrading to 250. After that it was 10.1.0 for me. I do not remember what was in between 5.7.3 and 6.0.9

EDIT: a search on my NAS revealed that I have 6.0.6, 0.7, 0.8, 0.9 and 0.10. For 7.x I have 0.0, 1.0, 1.1 and 1.3. 8.x = 0.0, 1.0, 1.1, 1.2 and 1.3. For 9.x I only have 9.0.1 and 10 I have 0.2, 0.5 and 1.0