Are we doomed with TizenOS watches??? Failing to create new certificates to sideload Tizen apps on the watch

Thanks to u/VNNGYN, and u/Shad0w82 on XDA, we were able to extract and back up our apps and watch faces. Now, here comes the sad part (fingers crossed). * we = Tizen OS watch users; mine being OG 2018 Galaxy Watch 46mm LTE (SM-805U)

I tried to create a certificate via Tizen certificate manager. And I get the following error message:

“java.security.Key.KeyStoreException: Key store type should be PKCS12 or any other valid entry”

And I found this on Samsung developer forum:

https://forum.developer.samsung.com/t/solution-for-pkcs-12-error-for-creating-cetificates-on-a-tizen-watch3/42338

https://preview.redd.it/bmi2vhiv6rsf1.png?width=881&format=png&auto=webp&s=120fe476f580e73089d2ea817442b0bb1429a4f4

I'm afraid, they discontinued certificates too. Or am I overreacting???

Any way to side load a new DUID on existing certificates??