semctool8.4 doubts, put your 0.2 cents

I had a z530 with firmware: R6AC001_RED49

I unlocked the phone, and could do some stuff on it, after that the phone has problems with the battery, it alweays says it is empty and shuts down, I have changed the battery...

I flashed the latest vesion trhinking this could be fix the problem, but it did not, now: I cant do anything more with semctool8.4 on the phone, because it says it is not supported for recovery !!

my question

is there any way to make it support the versio, by putting some files on any folder or something?

does this has to do with Generic non branded firmwares? so, should I customize or flash other firmware ?

Should I downgrade the firmware to the one it was before so semctool supports the recovery?

what to do ?

I want to repairr the GDFS...

TIA