The main repository for the source code is now on Codeberg
The new release for Bulbcalculator, the 3.1.0 version is released today.
The windows package for 32&64 bit platform are now available from the Download Page On the same page you the SHA512 checksum is available to check the downloaded file
I just uploaded the AUR package for Archlinux. You can find the relative AUR page at https://aur.archlinux.org/packages/bulbcalculator