Since the user mentioned a specific build date, they might be concerned about whether this version is still reliable, if any bugs exist, or if there are any security vulnerabilities. Older versions could potentially have issues that later builds fixed. Also, compatibility with modern hardware or operating systems might be a concern for someone using this in 2023 or 2024.
: This version is known to work on Windows 10, though newer versions (Flexi 12 and above) are recommended for full compatibility with Windows 11. sai flexisign pro v1001 build 1577 12 2020 link
FlexiSign Pro v10.0.1 Build 1577 (released in December 2020) offers numerous features and benefits, including: Since the user mentioned a specific build date,