Hacking Help reviving an old r4 SDHC gold pro 2017 with timebomb on it

[GoldAnthro]

Back in 2017 I bought the card and at some point used ntrboot by flashing it to my card.Is there a way to undo this so I can just use it as a regular flashcard for DS games? I know twilight++ menu exists but last time i played tetris ds and similar titles some of them were unbootable. any help would be appreciated.
edit: r4 3ds upgrade SDHC gold pro 2017 real time save

 

[KleinesSinchen]

Back in 2017 I bought the card and at some point used ntrboot by flashing it to my card.Is there a way to undo this so I can just use it as a regular flashcard for DS games? I know twilight++ menu exists but last time i played tetris ds and similar titles some of them were unbootable. any help would be appreciated.
edit: r4 3ds upgrade SDHC gold pro 2017 real time save

If it is still flashed with ntrboot(hax) flash it back to normal operation:
https://3ds.hacks.guide/installing-boot9strap-(ntrboot)#section-v---removing-ntrboot

About the timebomb:

• Update to latest still working official kernel (if available) –or–
  
• Spoof the date –or–
  
• Try switching to YSMenu

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In case you can't get the R4 working again and depending on when you tried TWiLight Menu++ you should give it another chance. It is under constant development and has improved A LOT.

Good luck in any case.