Can aluminum solder paste be used in electronic circuits?
I would not try it.  

It is made to solder to aluminum.  

Aluminum has a very hard oxide coating, and the flux in the solder paste has to remove it so that the solder can stick to the metal.

That means a very aggresive flux.

The flux used in solder paste for  plumbing (copper water lines and such) is too aggressive for electronics - and it only has to deal with copper oxides, which are far easier to remove than aluminum oxides

I expect flux for aluminum to be much harsher than flux for copper.

Plumbers soldering paste can eat the traces right off of your circuit board.

Aluminum soldering paste will probably do the same, but faster.