@César
In xtool ue4 plugin, you have to add 0x before the key, otherwise decryption does not work.
Example
Code:
xtool:c128mb:mreflate:d1:mue4,k0x6005F03B0D2DABCD75892C80958FFB00CBA5437AD37EB4BFCD5960FFE0C4E12D
Compressed 1 file, 552,580,759 => 995,427,776 bytes. Ratio 180.14%
Compression time: cpu 0.23 sec/real 14.92 sec = 2%. Speed 37.04 mB/s
All OK
Code:
xtool:c128mb:mreflate:d1:mue4,k6005F03B0D2DABCD75892C80958FFB00CBA5437AD37EB4BFCD5960FFE0C4E12D
Compressed 1 file, 552,580,759 => 552,581,284 bytes. Ratio 100.00%
Compression time: cpu 0.20 sec/real 4.74 sec = 4%. Speed 116.58 mB/s
All OK
0x will not be added if you choose the key from the drop down list.