Laserfiche migration to Alfresco
Solution 1:
It sounds like a pretty horrific case of Vendor Lock-in. If I were in your place, I'd spend some serious time unpicking the Laserfiche file format with hex editors, and so on, see if I could figure out anything from the content of the file, and the hex representation of it. It might turn out that there's something standards-compliant buried inside an ugly dirty proprietary file.
It's probably against their terms and conditions, but if you don't shout too loudly about it, who gives a toss?
There has to be some way to get the data out of these files, but it's a matter of how dirty you're prepared to get.