Design a client portal web application for my legacy Clarion Database using Topspeed databases

I have a legacy application using topspeed databases and written in Clarion programming language, which I understand plays well with other languages. Web portal functionality is built into the application, and has worked in the past. Usernames and Passwords exist. I just don't know how to implement functionality again. On my wishlist, is updating some of the pdfs the program creates (and appropriate tweeks to the user interface). I would love an Android application users in the field could use to update the application. This functionality is also built into the program, and the updates would be approved by the administrator prior to the databases being updated. If the program could be updated and intergrated, restoring email from the program functionality, that would be perfect. At the bare minimum, I need a web portal so my clients can check the status of the jobs we have out for them. If building a new solution in another language (without losing the data) is more cost effective, I'm all for it, but it has dozens of modules and databases within it, so I'm not sure of the labor involved. I do ask any freelancer to sign an non-disclosure as they will be privy to trade and company secrets.