If you have had to restore your computer, move to another computer, etc and no longer have CSB:
You can
1) redownload the software here:
http://www.globalscape.com/support/csb.aspxGet ONLY the version YOU had before (CSB3, CSB4, or CSB5).
2) If you have the SERIAL NUMBER written down you can unlock it and keep working on your website. The serial number will only unlock the version you had before.
GlobalSCAPE has a way to get your serial number if you don't have it written down. All you need is the email address that was used to purchase the software.
http://www.globalscape.com/support/ They can send the info to any email addy, as long as you know the ORIGINAL email addy.
If you have the TLX design file(s) that were used to build your site, you can begin to edit and publish once you input your HOST information (like ftp, url, username, password, etc).
If you do not have the TLX design file(s) then you will need to COPY PASTE your website content into a new design file and republish OR switch to a different software and build new pages.