[plt-scheme] Status of SrPersist

I try to use SrPersist, but I get the following error:

open-input-file: cannot open input file: "/Applications/PLT-Scheme- 
v372/collects/srpersist/private/srpmain.ss" (No such file or  
directory; errno=2)


(module db mzscheme
   (require (lib "srpersist.ss" "srpersist"))
   (define x 10))

Is srpersist being developed. Are there any alternatives packages?

Thanks,

Jaime