Double Opt-In Email Confirmation Link Encoding

hello,

I am using sendpress (free version) for the first time.
everything works quite fine, except when setting up the double opt-in confirmation email by wrapping the quicktag in a css formatted link:
<a style="color: #005da8" href="*|SP:CONFIRMLINK|*">Please confirm your registration</a>

then in the confirmation-email the quicktag isn’t changed into a confirmation link. instead the “pipe” character is converted into percent-encoding like this: x-msg://434/*%7CSP:CONFIRMLINK%7C*

I have already checked the database, no encoding there, except for table “sendpress_report_url”, showing *%7CSP:CONFIRMLINK%7C%* and %2A%7CSP:CONFIRMLINK%7C%2A.

any hints on how to solve this?

——————

WordPress Version: 4.0
SendPress Version: 1.0.1
PHP Version: 5.4.16
PHP Memory Limit: 256 MByte
PHP Memory Used: 17.5 MByte
MySQL Version: 5.6.19

Database Tables:
XXX_sendpress_subscribers_event OK
XXX_sendpress_report_url OK
XXX_sendpress_subscribers_status OK
XXX_sendpress_subscribers OK
XXX_sendpress_list_subscribers OK
XXX_sendpress_queue OK

// Generated by the SendPress Plugin //

Multisite: No
WordPress Version: 4.0
Permalink Structure: /%postname%/
Active Theme: based upon underscores theme
PHP Version: 5.4.16
MySQL Version: 5.6.19-67.0-log
Web Server Info: Apache/2.2.22
WordPress Memory Limit: 40MB
PHP Safe Mode: No
PHP Memory Limit: 256M
PHP Upload Max Size: 20M
PHP Post Max Size: 8M
PHP Upload Max Filesize: 20M
PHP Time Limit: 90
PHP Max Input Vars: 1000
PHP Arg Separator: &
PHP Allow URL File Open: Yes
WP_DEBUG: Disabled
WP Table Prefix: Length: 10 Status: Acceptable
WP Remote Post: wp_remote_post() works
Session: Disabled
Session Name: PHPSESSID
Cookie Path: /
Save Path: /tmp
Use Cookies: On
Use Only Cookies: On
DISPLAY ERRORS: On (1)
FSOCKOPEN: Your server supports fsockopen.
cURL: Your server supports cURL.
SOAP Client: Your server has the SOAP Client enabled.
SUHOSIN: Your server does not have SUHOSIN installed.

ACTIVE PLUGINS:
Adjustly Nextpage: 0.1
AntiVirus: 1.3.8
Category Widget: 1.5.1.1
CMS Dashboard: 2.0
CMS Page Order: 0.3.3
Contact Form 7: 3.9.3
Duplicate Post: 2.6
Easy FancyBox: 1.5.6
Google Sitemap: 2.9.3
Linkable Title Html and Php Widget by PepLamb: 1.2.6
Members: 0.2.4
Page Security by Contexture: 1.5.11
Post Types Order: 1.7.4
PS Auto Sitemap: 1.1.8
Related Posts by Category: 0.9.1
Reveal IDs: 1.4.5
SendPress Newsletters: 1.0.1
Sidebar Login: 2.7.1
Simple History: 1.3.10
Simple Links: 2.7.4
Theme Check: 20140929.1
TinyMCE Advanced: 4.1.1
TinyMCE Color Picker: 1.3
Widget Logic: 0.57
WP-chgFontSize: 1.8
WP-Filebase: 0.3.0.06
WP-Optimize: 1.8.9.7
WP-UserOnline: 2.84

https://wordpress.org/plugins/sendpress/