No. You buy it once (usually $19.95–$39.95) and it works forever on that major version of macOS.
To ensure is fully working without resorting to temporary "trial reset" scripts, you must complete the official activation process. According to Paragon Software's Knowledge Base , the only way to bypass trial limitations permanently is through a valid product license and account login. Steps for a Fully Working Installation To avoid common errors or expiration issues: Paragon NTFS fully working NO Trial Reset
That only happens with a or a bundled OEM version. Paragon NTFS fully working NO Trial Reset