PFP 4.5 database to Android Alzex Finance: error 253

Hello,

I'm using PFP on my laptop for many years.

I would like to switch to the mobile Alzex Finance on my smartphone and eventually add later a new PFP version on my desktop computer and use the Dropbox synchronizing.

I saved my 4.5 database, then uploaded it to my Dropbox but when I try to open it with my smartphone, I get a 253 error.

Could you help me to rescue my old database ?

Thanks a lot.

Michael.